646535032 has 64 divisors (see below), whose sum is σ = 1429112160. Its totient is φ = 270336000.

The previous prime is 646535011. The next prime is 646535047. The reversal of 646535032 is 230535646.

646535032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 403032 + ... + 404632.

Almost surely, 2^646535032 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 646535032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (714556080).

646535032 is an abundant number, since it is smaller than the sum of its proper divisors (782577128).

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

646535032 is a wasteful number, since it uses less digits than its factorization.

646535032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984 (or 1980 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 34.

The square root of 646535032 is about 25427.0531521055. The cubic root of 646535032 is about 864.6971361099.

The spelling of 646535032 in words is "six hundred forty-six million, five hundred thirty-five thousand, thirty-two".