656218332 has 108 divisors (see below), whose sum is σ = 2083846128. Its totient is φ = 170438400.

The previous prime is 656218291. The next prime is 656218349. The reversal of 656218332 is 233812656.

It is a happy number.

656218332 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 19732 + ... + 41252.

Almost surely, 2^656218332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656218332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041923064).

656218332 is an abundant number, since it is smaller than the sum of its proper divisors (1427627796).

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

656218332 is a wasteful number, since it uses less digits than its factorization.

656218332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21560 (or 21544 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 656218332 is about 25616.7588113719. The cubic root of 656218332 is about 868.9926827349.

The spelling of 656218332 in words is "six hundred fifty-six million, two hundred eighteen thousand, three hundred thirty-two".