255991488 has 28 divisors (see below), whose sum is σ = 677311320. Its totient is φ = 85330432.

The previous prime is 255991451. The next prime is 255991499. The reversal of 255991488 is 884199552.

It is a self number, because there is not a number n which added to its sum of digits gives 255991488.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 666453 + ... + 666836.

It is an arithmetic number, because the mean of its divisors is an integer number (24189690).

Almost surely, 2^255991488 is an apocalyptic number.

It is an amenable number.

255991488 is an abundant number, since it is smaller than the sum of its proper divisors (421319832).

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

255991488 is a wasteful number, since it uses less digits than its factorization.

255991488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333304 (or 1333294 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 51.

The square root of 255991488 is about 15999.7339977888. The cubic root of 255991488 is about 634.9533832313.

The spelling of 255991488 in words is "two hundred fifty-five million, nine hundred ninety-one thousand, four hundred eighty-eight".