13687888 has 20 divisors (see below), whose sum is σ = 26694100. Its totient is φ = 6799104.

The previous prime is 13687879. The next prime is 13687897. The reversal of 13687888 is 88878631.

It is an interprime number because it is at equal distance from previous prime (13687879) and next prime (13687897).

It can be written as a sum of positive squares in 2 ways, for example, as 2585664 + 11102224 = 1608^2 + 3332^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213 + ... + 5236.

It is an arithmetic number, because the mean of its divisors is an integer number (1334705).

Almost surely, 2^13687888 is an apocalyptic number.

It is an amenable number.

13687888 is a deficient number, since it is larger than the sum of its proper divisors (13006212).

13687888 is a wasteful number, since it uses less digits than its factorization.

13687888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5614 (or 5608 counting only the distinct ones).

The product of its digits is 516096, while the sum is 49.

The square root of 13687888 is about 3699.7145835861. The cubic root of 13687888 is about 239.2097153804.

The spelling of 13687888 in words is "thirteen million, six hundred eighty-seven thousand, eight hundred eighty-eight".