16311808 has 20 divisors (see below), whose sum is σ = 32592780. Its totient is φ = 8155648.

The previous prime is 16311791. The next prime is 16311821. The reversal of 16311808 is 80811361.

It is a happy number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 2.

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, 15418 + ... + 16441.

It is an arithmetic number, because the mean of its divisors is an integer number (1629639).

Almost surely, 2^16311808 is an apocalyptic number.

It is an amenable number.

16311808 is a deficient number, since it is larger than the sum of its proper divisors (16280972).

16311808 is an frugal number, since it uses more digits than its factorization.

16311808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31877 (or 31861 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 16311808 is about 4038.7879369930. The cubic root of 16311808 is about 253.6105798211.

The spelling of 16311808 in words is "sixteen million, three hundred eleven thousand, eight hundred eight".