646402632 has 32 divisors (see below), whose sum is σ = 1616808480. Its totient is φ = 215360640.

The previous prime is 646402619. The next prime is 646402661. The reversal of 646402632 is 236204646.

It is a junction number, because it is equal to n+sod(n) for n = 646402593 and 646402602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53907 + ... + 64797.

It is an arithmetic number, because the mean of its divisors is an integer number (50525265).

Almost surely, 2^646402632 is an apocalyptic number.

It is an amenable number.

646402632 is an abundant number, since it is smaller than the sum of its proper divisors (970405848).

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

646402632 is a wasteful number, since it uses less digits than its factorization.

646402632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13373 (or 13369 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 646402632 is about 25424.4494925652. The cubic root of 646402632 is about 864.6381067142.

The spelling of 646402632 in words is "six hundred forty-six million, four hundred two thousand, six hundred thirty-two".