255699980 has 12 divisors (see below), whose sum is σ = 536970000. Its totient is φ = 102279984.

The previous prime is 255699959. The next prime is 255699991. The reversal of 255699980 is 89996552.

It is a happy number.

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, 6392480 + ... + 6392519.

It is an arithmetic number, because the mean of its divisors is an integer number (44747500).

Almost surely, 2^255699980 is an apocalyptic number.

255699980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

255699980 is an abundant number, since it is smaller than the sum of its proper divisors (281270020).

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

255699980 is a wasteful number, since it uses less digits than its factorization.

255699980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12785008 (or 12785006 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 53.

The square root of 255699980 is about 15990.6216264409. The cubic root of 255699980 is about 634.7122758742.

The spelling of 255699980 in words is "two hundred fifty-five million, six hundred ninety-nine thousand, nine hundred eighty".