256999272 has 32 divisors (see below), whose sum is σ = 643330080. Its totient is φ = 85555520.

The previous prime is 256999271. The next prime is 256999277. The reversal of 256999272 is 272999652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (256999271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13183 + ... + 26225.

It is an arithmetic number, because the mean of its divisors is an integer number (20104065).

Almost surely, 2^256999272 is an apocalyptic number.

It is an amenable number.

256999272 is an abundant number, since it is smaller than the sum of its proper divisors (386330808).

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

256999272 is a wasteful number, since it uses less digits than its factorization.

256999272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13873 (or 13869 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 51.

The square root of 256999272 is about 16031.1968361692. The cubic root of 256999272 is about 635.7855176456.

The spelling of 256999272 in words is "two hundred fifty-six million, nine hundred ninety-nine thousand, two hundred seventy-two".