255617904 has 80 divisors (see below), whose sum is σ = 683126912. Its totient is φ = 82301184.

The previous prime is 255617893. The next prime is 255617917. The reversal of 255617904 is 409716552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 289047 + ... + 289929.

Almost surely, 2^255617904 is an apocalyptic number.

255617904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 255617904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341563456).

255617904 is an abundant number, since it is smaller than the sum of its proper divisors (427509008).

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

255617904 is a wasteful number, since it uses less digits than its factorization.

255617904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094 (or 1088 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 255617904 is about 15988.0550411862. The cubic root of 255617904 is about 634.6443574493.

The spelling of 255617904 in words is "two hundred fifty-five million, six hundred seventeen thousand, nine hundred four".