16378816 has 14 divisors (see below), whose sum is σ = 32501840. Its totient is φ = 8189376.

The previous prime is 16378807. The next prime is 16378849. The reversal of 16378816 is 61887361.

It is a super-2 number, since 2×16378816² = 536531227123712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127896 + ... + 128023.

It is an arithmetic number, because the mean of its divisors is an integer number (2321560).

Almost surely, 2^16378816 is an apocalyptic number.

16378816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16378816 is a deficient number, since it is larger than the sum of its proper divisors (16123024).

16378816 is an equidigital number, since it uses as much as digits as its factorization.

16378816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255931 (or 255921 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 16378816 is about 4047.0749931278. The cubic root of 16378816 is about 253.9573780964.

The spelling of 16378816 in words is "sixteen million, three hundred seventy-eight thousand, eight hundred sixteen".