16163904 has 56 divisors (see below), whose sum is σ = 44256960. Its totient is φ = 5200384.

The previous prime is 16163899. The next prime is 16163921. The reversal of 16163904 is 40936161.

It is a super-2 number, since 2×16163904² = 522543585042432, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4117 + ... + 7019.

Almost surely, 2^16163904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16163904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22128480).

16163904 is an abundant number, since it is smaller than the sum of its proper divisors (28093056).

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

16163904 is a wasteful number, since it uses less digits than its factorization.

16163904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2947 (or 2937 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 16163904 is about 4020.4357972737. The cubic root of 16163904 is about 252.8417305463.

The spelling of 16163904 in words is "sixteen million, one hundred sixty-three thousand, nine hundred four".