13866816 has 28 divisors (see below), whose sum is σ = 36689792. Its totient is φ = 4622208.

The previous prime is 13866793. The next prime is 13866821. The reversal of 13866816 is 61866831.

It is a nude number because it is divisible by every one of its digits.

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, 35920 + ... + 36303.

Almost surely, 2^13866816 is an apocalyptic number.

13866816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13866816 is an abundant number, since it is smaller than the sum of its proper divisors (22822976).

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

13866816 is an equidigital number, since it uses as much as digits as its factorization.

13866816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72238 (or 72228 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 13866816 is about 3723.8173961675. The cubic root of 13866816 is about 240.2475224094.

The spelling of 13866816 in words is "thirteen million, eight hundred sixty-six thousand, eight hundred sixteen".