13881984 has 32 divisors (see below), whose sum is σ = 36875040. Its totient is φ = 4627200.

The previous prime is 13881983. The next prime is 13881997. The reversal of 13881984 is 48918831.

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

It is not an unprimeable number, because it can be changed into a prime (13881983) 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, 17692 + ... + 18459.

It is an arithmetic number, because the mean of its divisors is an integer number (1152345).

Almost surely, 2^13881984 is an apocalyptic number.

It is an amenable number.

13881984 is an abundant number, since it is smaller than the sum of its proper divisors (22993056).

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

13881984 is an equidigital number, since it uses as much as digits as its factorization.

13881984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36168 (or 36156 counting only the distinct ones).

The product of its digits is 55296, while the sum is 42.

The square root of 13881984 is about 3725.8534592761. The cubic root of 13881984 is about 240.3350874894.

The spelling of 13881984 in words is "thirteen million, eight hundred eighty-one thousand, nine hundred eighty-four".