13977888 has 24 divisors (see below), whose sum is σ = 36692208. Its totient is φ = 4659264.

The previous prime is 13977877. The next prime is 13977889. The reversal of 13977888 is 88877931.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 13977888.

It is not an unprimeable number, because it can be changed into a prime (13977889) 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, 72706 + ... + 72897.

It is an arithmetic number, because the mean of its divisors is an integer number (1528842).

Almost surely, 2^13977888 is an apocalyptic number.

It is an amenable number.

13977888 is an abundant number, since it is smaller than the sum of its proper divisors (22714320).

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

13977888 is a wasteful number, since it uses less digits than its factorization.

13977888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145616 (or 145608 counting only the distinct ones).

The product of its digits is 677376, while the sum is 51.

The square root of 13977888 is about 3738.7013788213. The cubic root of 13977888 is about 240.8872713034.

It can be divided in two parts, 13 and 977888, that added together give a triangular number (977901 = T₁₃₉₈).

The spelling of 13977888 in words is "thirteen million, nine hundred seventy-seven thousand, eight hundred eighty-eight".