256830418 has 16 divisors (see below), whose sum is σ = 415459800. Its totient is φ = 118371456.

The previous prime is 256830403. The next prime is 256830433. The reversal of 256830418 is 814038652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256830403) and next prime (256830433).

It can be written as a sum of positive squares in 4 ways, for example, as 199176769 + 57653649 = 14113^2 + 7593^2 .

It is a super-2 number, since 2×256830418² = 131923727220109448, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13158 + ... + 26206.

Almost surely, 2^256830418 is an apocalyptic number.

256830418 is a deficient number, since it is larger than the sum of its proper divisors (158629382).

256830418 is a wasteful number, since it uses less digits than its factorization.

256830418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13821.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 256830418 is about 16025.9295518232. The cubic root of 256830418 is about 635.6462455937.

The spelling of 256830418 in words is "two hundred fifty-six million, eight hundred thirty thousand, four hundred eighteen".