656139230 has 8 divisors (see below), whose sum is σ = 1181050632. Its totient is φ = 262455688.

The previous prime is 656139229. The next prime is 656139251. The reversal of 656139230 is 32931656.

656139230 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32806952 + ... + 32806971.

It is an arithmetic number, because the mean of its divisors is an integer number (147631329).

Almost surely, 2^656139230 is an apocalyptic number.

656139230 is a deficient number, since it is larger than the sum of its proper divisors (524911402).

656139230 is a wasteful number, since it uses less digits than its factorization.

656139230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65613930.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 656139230 is about 25615.2148146370. The cubic root of 656139230 is about 868.9577645692.

The spelling of 656139230 in words is "six hundred fifty-six million, one hundred thirty-nine thousand, two hundred thirty".