256072838 has 16 divisors (see below), whose sum is σ = 440904480. Its totient is φ = 109264896.

The previous prime is 256072807. The next prime is 256072841. The reversal of 256072838 is 838270652.

256072838 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 2×256072838² = 131146596722748488, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256072795 and 256072804.

It is a congruent number.

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, 36731 + ... + 43142.

It is an arithmetic number, because the mean of its divisors is an integer number (27556530).

Almost surely, 2^256072838 is an apocalyptic number.

256072838 is a deficient number, since it is larger than the sum of its proper divisors (184831642).

256072838 is a wasteful number, since it uses less digits than its factorization.

256072838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80111.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 256072838 is about 16002.2760256159. The cubic root of 256072838 is about 635.0206354507.

The spelling of 256072838 in words is "two hundred fifty-six million, seventy-two thousand, eight hundred thirty-eight".