656870452 has 24 divisors (see below), whose sum is σ = 1321617024. Its totient is φ = 279828192.

The previous prime is 656870441. The next prime is 656870453. The reversal of 656870452 is 254078656.

It is a junction number, because it is equal to n+sod(n) for n = 656870399 and 656870408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656870453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65563 + ... + 74914.

It is an arithmetic number, because the mean of its divisors is an integer number (55067376).

Almost surely, 2^656870452 is an apocalyptic number.

It is an amenable number.

656870452 is an abundant number, since it is smaller than the sum of its proper divisors (664746572).

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

656870452 is a wasteful number, since it uses less digits than its factorization.

656870452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140655 (or 140653 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 656870452 is about 25629.4840369446. The cubic root of 656870452 is about 869.2804425999.

The spelling of 656870452 in words is "six hundred fifty-six million, eight hundred seventy thousand, four hundred fifty-two".