13622920 has 16 divisors (see below), whose sum is σ = 30651660. Its totient is φ = 5449152.

The previous prime is 13622897. The next prime is 13622977. The reversal of 13622920 is 2922631.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12802084 + 820836 = 3578^2 + 906^2 .

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, 170247 + ... + 170326.

Almost surely, 2^13622920 is an apocalyptic number.

13622920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13622920 is an abundant number, since it is smaller than the sum of its proper divisors (17028740).

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

13622920 is a wasteful number, since it uses less digits than its factorization.

13622920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340584 (or 340580 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 13622920 is about 3690.9240035525. The cubic root of 13622920 is about 238.8306544750.

The spelling of 13622920 in words is "thirteen million, six hundred twenty-two thousand, nine hundred twenty".