13856628 has 36 divisors (see below), whose sum is σ = 33548928. Its totient is φ = 4446720.

The previous prime is 13856617. The next prime is 13856629. The reversal of 13856628 is 82665831.

It is a happy number.

It is a super-2 number, since 2×13856628² = 384012279060768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13856629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71700 + ... + 71892.

Almost surely, 2^13856628 is an apocalyptic number.

It is an amenable number.

13856628 is an abundant number, since it is smaller than the sum of its proper divisors (19692300).

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

13856628 is a wasteful number, since it uses less digits than its factorization.

13856628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 229 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 13856628 is about 3722.4491937433. The cubic root of 13856628 is about 240.1886710857.

The spelling of 13856628 in words is "thirteen million, eight hundred fifty-six thousand, six hundred twenty-eight".