256573734 has 16 divisors (see below), whose sum is σ = 518229360. Its totient is φ = 84677600.

The previous prime is 256573729. The next prime is 256573769. The reversal of 256573734 is 437375652.

It is a Curzon number.

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, 211089 + ... + 212300.

It is an arithmetic number, because the mean of its divisors is an integer number (32389335).

Almost surely, 2^256573734 is an apocalyptic number.

256573734 is an abundant number, since it is smaller than the sum of its proper divisors (261655626).

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

256573734 is a wasteful number, since it uses less digits than its factorization.

256573734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423495.

The product of its digits is 529200, while the sum is 42.

The square root of 256573734 is about 16017.9191532483. The cubic root of 256573734 is about 635.4344137189.

The spelling of 256573734 in words is "two hundred fifty-six million, five hundred seventy-three thousand, seven hundred thirty-four".