256120634 has 32 divisors (see below), whose sum is σ = 495504000. Its totient is φ = 96344640.

The previous prime is 256120633. The next prime is 256120637. The reversal of 256120634 is 436021652.

256120634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256120597 and 256120606.

It is not an unprimeable number, because it can be changed into a prime (256120633) 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, 24209 + ... + 33140.

It is an arithmetic number, because the mean of its divisors is an integer number (15484500).

Almost surely, 2^256120634 is an apocalyptic number.

256120634 is a deficient number, since it is larger than the sum of its proper divisors (239383366).

256120634 is a wasteful number, since it uses less digits than its factorization.

256120634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57398.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 256120634 is about 16003.7693684957. The cubic root of 256120634 is about 635.0601418640.

The spelling of 256120634 in words is "two hundred fifty-six million, one hundred twenty thousand, six hundred thirty-four".