256918458 has 16 divisors (see below), whose sum is σ = 522261216. Its totient is φ = 84235440.

The previous prime is 256918451. The next prime is 256918477. The reversal of 256918458 is 854819652.

256918458 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256918458² = 132014188122195528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256918451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350616 + ... + 351347.

It is an arithmetic number, because the mean of its divisors is an integer number (32641326).

Almost surely, 2^256918458 is an apocalyptic number.

256918458 is an abundant number, since it is smaller than the sum of its proper divisors (265342758).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256918458 is a wasteful number, since it uses less digits than its factorization.

256918458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702029.

The product of its digits is 691200, while the sum is 48.

The square root of 256918458 is about 16028.6761150134. The cubic root of 256918458 is about 635.7188692632.

The spelling of 256918458 in words is "two hundred fifty-six million, nine hundred eighteen thousand, four hundred fifty-eight".