256153772 has 24 divisors (see below), whose sum is σ = 522765600. Its totient is φ = 109779600.

The previous prime is 256153753. The next prime is 256153867. The reversal of 256153772 is 277351652.

It is a super-2 number, since 2×256153772² = 131229509819655968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91979 + ... + 94722.

It is an arithmetic number, because the mean of its divisors is an integer number (21781900).

Almost surely, 2^256153772 is an apocalyptic number.

It is an amenable number.

256153772 is an abundant number, since it is smaller than the sum of its proper divisors (266611828).

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

256153772 is a wasteful number, since it uses less digits than its factorization.

256153772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186726 (or 186710 counting only the distinct ones).

The product of its digits is 88200, while the sum is 38.

The square root of 256153772 is about 16004.8046536032. The cubic root of 256153772 is about 635.0875296293.

The spelling of 256153772 in words is "two hundred fifty-six million, one hundred fifty-three thousand, seven hundred seventy-two".