622971920 has 20 divisors (see below), whose sum is σ = 1448409900. Its totient is φ = 249188736.

The previous prime is 622971883. The next prime is 622971931. The reversal of 622971920 is 29179226.

It can be written as a sum of positive squares in 2 ways, for example, as 148254976 + 474716944 = 12176^2 + 21788^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 3893495 + ... + 3893654.

It is an arithmetic number, because the mean of its divisors is an integer number (72420495).

Almost surely, 2^622971920 is an apocalyptic number.

It is an amenable number.

622971920 is an abundant number, since it is smaller than the sum of its proper divisors (825437980).

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

622971920 is a wasteful number, since it uses less digits than its factorization.

622971920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7787162 (or 7787156 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 622971920 is about 24959.4054416366. The cubic root of 622971920 is about 854.0621797658.

The spelling of 622971920 in words is "six hundred twenty-two million, nine hundred seventy-one thousand, nine hundred twenty".