13615920 has 60 divisors (see below), whose sum is σ = 45729216. Its totient is φ = 3630720.

The previous prime is 13615897. The next prime is 13615937. The reversal of 13615920 is 2951631.

13615920 is a `hidden beast` number, since 13 + 61 + 592 + 0 = 666.

13615920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8736 + ... + 10175.

Almost surely, 2^13615920 is an apocalyptic number.

13615920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13615920 is an abundant number, since it is smaller than the sum of its proper divisors (32113296).

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

13615920 is a wasteful number, since it uses less digits than its factorization.

13615920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18930 (or 18921 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 13615920 is about 3689.9756096755. The cubic root of 13615920 is about 238.7897405590.

It can be divided in two parts, 13615 and 920, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 13615920 in words is "thirteen million, six hundred fifteen thousand, nine hundred twenty".