255718940 has 24 divisors (see below), whose sum is σ = 538151040. Its totient is φ = 102070208.

The previous prime is 255718937. The next prime is 255718961. The reversal of 255718940 is 49817552.

It is a congruent number.

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, 3767 + ... + 22926.

It is an arithmetic number, because the mean of its divisors is an integer number (22422960).

Almost surely, 2^255718940 is an apocalyptic number.

255718940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255718940 is an abundant number, since it is smaller than the sum of its proper divisors (282432100).

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

255718940 is a wasteful number, since it uses less digits than its factorization.

255718940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27181 (or 27179 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 255718940 is about 15991.2144629481. The cubic root of 255718940 is about 634.7279633311.

The spelling of 255718940 in words is "two hundred fifty-five million, seven hundred eighteen thousand, nine hundred forty".