13921886 has 8 divisors (see below), whose sum is σ = 22781304. Its totient is φ = 6328120.

The previous prime is 13921871. The next prime is 13921891. The reversal of 13921886 is 68812931.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 316385 + ... + 316428.

It is an arithmetic number, because the mean of its divisors is an integer number (2847663).

Almost surely, 2^13921886 is an apocalyptic number.

13921886 is a deficient number, since it is larger than the sum of its proper divisors (8859418).

13921886 is a wasteful number, since it uses less digits than its factorization.

13921886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632826.

The product of its digits is 20736, while the sum is 38.

The square root of 13921886 is about 3731.2043632050. The cubic root of 13921886 is about 240.5651381084.

The spelling of 13921886 in words is "thirteen million, nine hundred twenty-one thousand, eight hundred eighty-six".