13889628 has 36 divisors (see below), whose sum is σ = 35861280. Its totient is φ = 4530816.

The previous prime is 13889599. The next prime is 13889641. The reversal of 13889628 is 82698831.

13889628 is a `hidden beast` number, since 13 + 8 + 8 + 9 + 628 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2413 + ... + 5796.

Almost surely, 2^13889628 is an apocalyptic number.

13889628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

13889628 is an abundant number, since it is smaller than the sum of its proper divisors (21971652).

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

13889628 is a wasteful number, since it uses less digits than its factorization.

13889628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8266 (or 8261 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 13889628 is about 3726.8791233417. The cubic root of 13889628 is about 240.3791922397.

The spelling of 13889628 in words is "thirteen million, eight hundred eighty-nine thousand, six hundred twenty-eight".