256632984 has 48 divisors (see below), whose sum is σ = 695887920. Its totient is φ = 85440960.

The previous prime is 256632967. The next prime is 256632991. The reversal of 256632984 is 489236652.

256632984 is a `hidden beast` number, since 2 + 5 + 6 + 632 + 9 + 8 + 4 = 666.

Its product of digits (622080) is a multiple of the sum of its prime factors (4320).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78829 + ... + 82019.

It is an arithmetic number, because the mean of its divisors is an integer number (14497665).

Almost surely, 2^256632984 is an apocalyptic number.

256632984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

256632984 is an abundant number, since it is smaller than the sum of its proper divisors (439254936).

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

256632984 is a wasteful number, since it uses less digits than its factorization.

256632984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4320 (or 4313 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 256632984 is about 16019.7685376537. The cubic root of 256632984 is about 635.4833231048.

The spelling of 256632984 in words is "two hundred fifty-six million, six hundred thirty-two thousand, nine hundred eighty-four".