656423306 has 72 divisors (see below), whose sum is σ = 1269878148. Its totient is φ = 253545600.

The previous prime is 656423297. The next prime is 656423351. The reversal of 656423306 is 603324656.

It can be written as a sum of positive squares in 2 ways, for example, as 551545225 + 104878081 = 23485^2 + 10241^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2335886 + ... + 2336166.

Almost surely, 2^656423306 is an apocalyptic number.

656423306 is a deficient number, since it is larger than the sum of its proper divisors (613454842).

656423306 is a wasteful number, since it uses less digits than its factorization.

656423306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 35.

The square root of 656423306 is about 25620.7592783664. The cubic root of 656423306 is about 869.0831517933.

The spelling of 656423306 in words is "six hundred fifty-six million, four hundred twenty-three thousand, three hundred six".