12920844 has 24 divisors (see below), whose sum is σ = 30964528. Its totient is φ = 4190400.

The previous prime is 12920839. The next prime is 12920857. The reversal of 12920844 is 44802921.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

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, 14107 + ... + 14994.

Almost surely, 2^12920844 is an apocalyptic number.

It is an amenable number.

12920844 is an abundant number, since it is smaller than the sum of its proper divisors (18043684).

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

12920844 is a wasteful number, since it uses less digits than its factorization.

12920844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29145 (or 29143 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 12920844 is about 3594.5575527455. The cubic root of 12920844 is about 234.6552603286.

The spelling of 12920844 in words is "twelve million, nine hundred twenty thousand, eight hundred forty-four".