256897338 has 32 divisors (see below), whose sum is σ = 521482752. Its totient is φ = 84360000.

The previous prime is 256897337. The next prime is 256897379. The reversal of 256897338 is 833798652.

It is not an unprimeable number, because it can be changed into a prime (256897337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134188 + ... + 136088.

It is an arithmetic number, because the mean of its divisors is an integer number (16296336).

Almost surely, 2^256897338 is an apocalyptic number.

256897338 is an abundant number, since it is smaller than the sum of its proper divisors (264585414).

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

256897338 is a wasteful number, since it uses less digits than its factorization.

256897338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230.

The product of its digits is 2177280, while the sum is 51.

The square root of 256897338 is about 16028.0172822467. The cubic root of 256897338 is about 635.7014490143.

The spelling of 256897338 in words is "two hundred fifty-six million, eight hundred ninety-seven thousand, three hundred thirty-eight".