646224860 has 12 divisors (see below), whose sum is σ = 1357072248. Its totient is φ = 258489936.

The previous prime is 646224857. The next prime is 646224877. The reversal of 646224860 is 68422646.

646224860 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 3 ways as a sum of consecutive naturals, for example, 16155602 + ... + 16155641.

It is an arithmetic number, because the mean of its divisors is an integer number (113089354).

Almost surely, 2^646224860 is an apocalyptic number.

It is an amenable number.

646224860 is an abundant number, since it is smaller than the sum of its proper divisors (710847388).

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

646224860 is a wasteful number, since it uses less digits than its factorization.

646224860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32311252 (or 32311250 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

The square root of 646224860 is about 25420.9531685970. The cubic root of 646224860 is about 864.5588359259.

The spelling of 646224860 in words is "six hundred forty-six million, two hundred twenty-four thousand, eight hundred sixty".