13687028 has 12 divisors (see below), whose sum is σ = 24310272. Its totient is φ = 6741240.

The previous prime is 13687013. The next prime is 13687031. The reversal of 13687028 is 82078631.

13687028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 25268 + ... + 25803.

It is an arithmetic number, because the mean of its divisors is an integer number (2025856).

Almost surely, 2^13687028 is an apocalyptic number.

It is an amenable number.

13687028 is a deficient number, since it is larger than the sum of its proper divisors (10623244).

13687028 is a wasteful number, since it uses less digits than its factorization.

13687028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51142 (or 51140 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 13687028 is about 3699.5983565787. The cubic root of 13687028 is about 239.2047054849.

The spelling of 13687028 in words is "thirteen million, six hundred eighty-seven thousand, twenty-eight".