13881628 has 12 divisors (see below), whose sum is σ = 25571560. Its totient is φ = 6575472.

The previous prime is 13881617. The next prime is 13881641. The reversal of 13881628 is 82618831.

13881628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 91251 + ... + 91402.

Almost surely, 2^13881628 is an apocalyptic number.

It is an amenable number.

13881628 is a deficient number, since it is larger than the sum of its proper divisors (11689932).

13881628 is a wasteful number, since it uses less digits than its factorization.

13881628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182676 (or 182674 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 13881628 is about 3725.8056846808. The cubic root of 13881628 is about 240.3330330275. Note that the first 3 decimals are identical.

The spelling of 13881628 in words is "thirteen million, eight hundred eighty-one thousand, six hundred twenty-eight".