13891564 has 12 divisors (see below), whose sum is σ = 24561544. Its totient is φ = 6873984.

The previous prime is 13891541. The next prime is 13891589. The reversal of 13891564 is 46519831.

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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17514 + ... + 18289.

Almost surely, 2^13891564 is an apocalyptic number.

It is an amenable number.

13891564 is a deficient number, since it is larger than the sum of its proper divisors (10669980).

13891564 is a wasteful number, since it uses less digits than its factorization.

13891564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35904 (or 35902 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 13891564 is about 3727.1388490369. The cubic root of 13891564 is about 240.3903601053.

The spelling of 13891564 in words is "thirteen million, eight hundred ninety-one thousand, five hundred sixty-four".