13920564 has 24 divisors (see below), whose sum is σ = 37121728. Its totient is φ = 3977280.

The previous prime is 13920541. The next prime is 13920587. The reversal of 13920564 is 46502931.

It is an interprime number because it is at equal distance from previous prime (13920541) and next prime (13920587).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82777 + ... + 82944.

Almost surely, 2^13920564 is an apocalyptic number.

13920564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13920564 is an abundant number, since it is smaller than the sum of its proper divisors (23201164).

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

13920564 is a wasteful number, since it uses less digits than its factorization.

13920564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165735 (or 165733 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 13920564 is about 3731.0272044036. The cubic root of 13920564 is about 240.5575233072.

The spelling of 13920564 in words is "thirteen million, nine hundred twenty thousand, five hundred sixty-four".