13938816 has 32 divisors (see below), whose sum is σ = 37026000. Its totient is φ = 4646144.

The previous prime is 13938797. The next prime is 13938817. The reversal of 13938816 is 61883931.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (13938817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17766 + ... + 18533.

Almost surely, 2^13938816 is an apocalyptic number.

13938816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13938816 is an abundant number, since it is smaller than the sum of its proper divisors (23087184).

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

13938816 is an equidigital number, since it uses as much as digits as its factorization.

13938816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36316 (or 36304 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 13938816 is about 3733.4723783631. The cubic root of 13938816 is about 240.6626133589.

The spelling of 13938816 in words is "thirteen million, nine hundred thirty-eight thousand, eight hundred sixteen".