255692640 has 96 divisors (see below), whose sum is σ = 920505600. Its totient is φ = 58443264.

The previous prime is 255692621. The next prime is 255692651. The reversal of 255692640 is 46296552.

It is a tau number, because it is divible by the number of its divisors (96).

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, 34690 + ... + 41409.

It is an arithmetic number, because the mean of its divisors is an integer number (9588600).

Almost surely, 2^255692640 is an apocalyptic number.

255692640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255692640 is an abundant number, since it is smaller than the sum of its proper divisors (664812960).

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

255692640 is a wasteful number, since it uses less digits than its factorization.

255692640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76124 (or 76116 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 39.

The square root of 255692640 is about 15990.3921152672. The cubic root of 255692640 is about 634.7062025681.

The spelling of 255692640 in words is "two hundred fifty-five million, six hundred ninety-two thousand, six hundred forty".