12622644 has 18 divisors (see below), whose sum is σ = 31907330. Its totient is φ = 4207536.

The previous prime is 12622633. The next prime is 12622663. The reversal of 12622644 is 44622621.

12622644 is a `hidden beast` number, since 12 + 6 + 2 + 2 + 644 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9998244 + 2624400 = 3162^2 + 1620^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×12622644² = 318662283101472, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 175279 + ... + 175350.

Almost surely, 2^12622644 is an apocalyptic number.

It is an amenable number.

12622644 is an abundant number, since it is smaller than the sum of its proper divisors (19284686).

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

12622644 is a wasteful number, since it uses less digits than its factorization.

12622644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350639 (or 350634 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 12622644 is about 3552.8360502562. The cubic root of 12622644 is about 232.8359901137.

The spelling of 12622644 in words is "twelve million, six hundred twenty-two thousand, six hundred forty-four".