656129892 has 48 divisors (see below), whose sum is σ = 1768398912. Its totient is φ = 187130880.

The previous prime is 656129797. The next prime is 656129893. The reversal of 656129892 is 298921656.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (656129893) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143953 + ... + 148440.

It is an arithmetic number, because the mean of its divisors is an integer number (36841644).

Almost surely, 2^656129892 is an apocalyptic number.

It is an amenable number.

656129892 is an abundant number, since it is smaller than the sum of its proper divisors (1112269020).

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

656129892 is a wasteful number, since it uses less digits than its factorization.

656129892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292428 (or 292426 counting only the distinct ones).

The product of its digits is 466560, while the sum is 48.

The square root of 656129892 is about 25615.0325395070. The cubic root of 656129892 is about 868.9536422907.

The spelling of 656129892 in words is "six hundred fifty-six million, one hundred twenty-nine thousand, eight hundred ninety-two".