13646720 has 32 divisors (see below), whose sum is σ = 32625720. Its totient is φ = 5458432.

The previous prime is 13646719. The next prime is 13646729. The reversal of 13646720 is 2764631.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13646729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10022 + ... + 11301.

Almost surely, 2^13646720 is an apocalyptic number.

13646720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13646720 is an abundant number, since it is smaller than the sum of its proper divisors (18979000).

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

13646720 is an equidigital number, since it uses as much as digits as its factorization.

13646720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21342 (or 21330 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 13646720 is about 3694.1467215042. The cubic root of 13646720 is about 238.9696570432.

The spelling of 13646720 in words is "thirteen million, six hundred forty-six thousand, seven hundred twenty".