253688256 has 42 divisors (see below), whose sum is σ = 727153232. Its totient is φ = 84562560.

The previous prime is 253688219. The next prime is 253688269. The reversal of 253688256 is 652886352.

It is a super-3 number, since 3×253688256³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 219640 + ... + 220791.

Almost surely, 2^253688256 is an apocalyptic number.

It is an amenable number.

253688256 is an abundant number, since it is smaller than the sum of its proper divisors (473464976).

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

253688256 is a wasteful number, since it uses less digits than its factorization.

253688256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440449 (or 440436 counting only the distinct ones).

The product of its digits is 691200, while the sum is 45.

The square root of 253688256 is about 15927.5941686119. The cubic root of 253688256 is about 633.0433548467.

The spelling of 253688256 in words is "two hundred fifty-three million, six hundred eighty-eight thousand, two hundred fifty-six".