656946224 has 20 divisors (see below), whose sum is σ = 1388545800. Its totient is φ = 298611840.

The previous prime is 656946209. The next prime is 656946233. The reversal of 656946224 is 422649656.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866149 + ... + 1866500.

It is an arithmetic number, because the mean of its divisors is an integer number (69427290).

Almost surely, 2^656946224 is an apocalyptic number.

It is an amenable number.

656946224 is an abundant number, since it is smaller than the sum of its proper divisors (731599576).

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

656946224 is a wasteful number, since it uses less digits than its factorization.

656946224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732668 (or 3732662 counting only the distinct ones).

The product of its digits is 622080, while the sum is 44.

The square root of 656946224 is about 25630.9622136977. The cubic root of 656946224 is about 869.3138660271.

The spelling of 656946224 in words is "six hundred fifty-six million, nine hundred forty-six thousand, two hundred twenty-four".