13857216 has 28 divisors (see below), whose sum is σ = 36664392. Its totient is φ = 4619008.

The previous prime is 13857197. The next prime is 13857229. The reversal of 13857216 is 61275831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35895 + ... + 36278.

Almost surely, 2^13857216 is an apocalyptic number.

13857216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13857216 is an abundant number, since it is smaller than the sum of its proper divisors (22807176).

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

13857216 is an equidigital number, since it uses as much as digits as its factorization.

13857216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72188 (or 72178 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 13857216 is about 3722.5281731640. The cubic root of 13857216 is about 240.1920684716.

The spelling of 13857216 in words is "thirteen million, eight hundred fifty-seven thousand, two hundred sixteen".