656254872 has 320 divisors, whose sum is σ = 2341785600. Its totient is φ = 167028480.

The previous prime is 656254867. The next prime is 656254931. The reversal of 656254872 is 278452656.

656254872 is a `hidden beast` number, since 6 + 562 + 5 + 4 + 87 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1827829 + ... + 1828187.

It is an arithmetic number, because the mean of its divisors is an integer number (7318080).

Almost surely, 2^656254872 is an apocalyptic number.

656254872 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656254872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1170892800).

656254872 is an abundant number, since it is smaller than the sum of its proper divisors (1685530728).

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

656254872 is a wasteful number, since it uses less digits than its factorization.

656254872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428 (or 415 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 656254872 is about 25617.4720064256. The cubic root of 656254872 is about 869.0088117181.

The spelling of 656254872 in words is "six hundred fifty-six million, two hundred fifty-four thousand, eight hundred seventy-two".