nontotient
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Nontotient — In number theory, a nontotient is a positive integer n which is not in the range of Euler s totient function φ, that is, for which φ(x) = n has no solution. In other words, n is a nontotient if there is no integer x that has exactly n coprimes… … Wikipedia
700 (number) — This article is about the numbers 700 through 799; for each individual number, see its section below. 700 (seven hundred) is the natural number following 699 and preceding 701. List of numbers Integers ← 0 100 200 300 400 500 600 700 800 … Wikipedia
800 (number) — This article is about the number 800. For the Common Era Year 800, see 800. For other uses, see 800 (disambiguation) 800 (eight hundred) is the natural number following 799 and preceding 801. List of numbers Integers ← 0 100 200 300 400 500 600… … Wikipedia
900 (number) — For the year 900, see 900 BC or 900 AD. 900 (nine hundred) is the natural number following 899 and preceding 901. It is the square of 30 and the sum of Euler s totient function for the first 54 integers. In base 10 it is a Harshad number. List of … Wikipedia
400 (number) — ← 399 401 → 400 List of numbers Integers ← 0 100 200 … Wikipedia
500 (number) — For other uses, see 500 (disambiguation). ← 499 501 → 500 List of numbers Integers … Wikipedia
600 (number) — For the year 600, see 600 BC or 600 AD. ← 599 601 → 600 List of numbers Integers ← … Wikipedia
300 (number) — This article is about the numbers 300 to 399. For other uses of 300, see 300 (disambiguation). For the guitar, see Gibson ES 335. For the British tilting train, see British Rail Class 390. For the Dada magazine, see 391 (magazine). For the… … Wikipedia
230 (number) — 230 ( two hundred [and] thirty ) is the natural number following 229 and preceding 231.In mathematicsIt is a composite number, with its divisors being 2, 5, 10, 23, 46, and 115. Its factorisation makes it a sphenic number. There is no integer… … Wikipedia
240 (number) — 240 ( two hundred [and] forty ) is the natural number following 239 and preceding 241.In mathematicsWith 20 divisors total (1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, and 240), more than any previous number, 240 is a… … Wikipedia
