255649688 has 32 divisors (see below), whose sum is σ = 554764800. Its totient is φ = 108175392.

The previous prime is 255649679. The next prime is 255649699. The reversal of 255649688 is 886946552.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

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, 24470 + ... + 33317.

It is an arithmetic number, because the mean of its divisors is an integer number (17336400).

Almost surely, 2^255649688 is an apocalyptic number.

255649688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

255649688 is an abundant number, since it is smaller than the sum of its proper divisors (299115112).

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

255649688 is a wasteful number, since it uses less digits than its factorization.

255649688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57879 (or 57875 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 53.

The square root of 255649688 is about 15989.0490023641. The cubic root of 255649688 is about 634.6706606411.

The spelling of 255649688 in words is "two hundred fifty-five million, six hundred forty-nine thousand, six hundred eighty-eight".