656222920 has 16 divisors (see below), whose sum is σ = 1476501660. Its totient is φ = 262489152.

The previous prime is 656222909. The next prime is 656222927. The reversal of 656222920 is 29222656.

It can be written as a sum of positive squares in 2 ways, for example, as 656076996 + 145924 = 25614^2 + 382^2 .

It is not an unprimeable number, because it can be changed into a prime (656222927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8202747 + ... + 8202826.

Almost surely, 2^656222920 is an apocalyptic number.

It is an amenable number.

656222920 is an abundant number, since it is smaller than the sum of its proper divisors (820278740).

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

656222920 is a wasteful number, since it uses less digits than its factorization.

656222920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16405584 (or 16405580 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 656222920 is about 25616.8483619668. The cubic root of 656222920 is about 868.9947079395.

The spelling of 656222920 in words is "six hundred fifty-six million, two hundred twenty-two thousand, nine hundred twenty".