13620972 has 12 divisors (see below), whose sum is σ = 31782296. Its totient is φ = 4540320.

The previous prime is 13620949. The next prime is 13621001. The reversal of 13620972 is 27902631.

It is a tau number, because it is divible by the number of its divisors (12).

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, 567529 + ... + 567552.

Almost surely, 2^13620972 is an apocalyptic number.

13620972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13620972 is an abundant number, since it is smaller than the sum of its proper divisors (18161324).

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

13620972 is a wasteful number, since it uses less digits than its factorization.

13620972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1135088 (or 1135086 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 13620972 is about 3690.6601035587. The cubic root of 13620972 is about 238.8192701244.

The spelling of 13620972 in words is "thirteen million, six hundred twenty thousand, nine hundred seventy-two".