13891556 has 12 divisors (see below), whose sum is σ = 27783168. Its totient is φ = 5953512.

The previous prime is 13891541. The next prime is 13891589. The reversal of 13891556 is 65519831.

13891556 is an admirable number.

It is a super-2 number, since 2×13891556² = 385950656202272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) 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, 248036 + ... + 248091.

It is an arithmetic number, because the mean of its divisors is an integer number (2315264).

Almost surely, 2^13891556 is an apocalyptic number.

It is an amenable number.

13891556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13891556 is a wasteful number, since it uses less digits than its factorization.

13891556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496138 (or 496136 counting only the distinct ones).

The product of its digits is 32400, while the sum is 38.

The square root of 13891556 is about 3727.1377758275. The cubic root of 13891556 is about 240.3903139592.

The spelling of 13891556 in words is "thirteen million, eight hundred ninety-one thousand, five hundred fifty-six".