255709992 has 32 divisors (see below), whose sum is σ = 654144480. Its totient is φ = 83254080.

The previous prime is 255709981. The next prime is 255710003. The reversal of 255709992 is 299907552.

It is an interprime number because it is at equal distance from previous prime (255709981) and next prime (255710003).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122859 + ... + 124922.

It is an arithmetic number, because the mean of its divisors is an integer number (20442015).

Almost surely, 2^255709992 is an apocalyptic number.

It is an amenable number.

255709992 is an abundant number, since it is smaller than the sum of its proper divisors (398434488).

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

255709992 is a wasteful number, since it uses less digits than its factorization.

255709992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247833 (or 247829 counting only the distinct ones).

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 255709992 is about 15990.9346818752. The cubic root of 255709992 is about 634.7205598748.

It can be divided in two parts, 2557099 and 92, that added together give a triangular number (2557191 = T₂₂₆₁).

The spelling of 255709992 in words is "two hundred fifty-five million, seven hundred nine thousand, nine hundred ninety-two".