16499904 has 56 divisors (see below), whose sum is σ = 45963840. Its totient is φ = 5209344.

The previous prime is 16499897. The next prime is 16499929. The reversal of 16499904 is 40999461.

16499904 = 1350² + 1351² + ... + 1358².

16499904 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 1387 + ... + 5909.

Almost surely, 2^16499904 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 16499904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22981920).

16499904 is an abundant number, since it is smaller than the sum of its proper divisors (29463936).

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

16499904 is a wasteful number, since it uses less digits than its factorization.

16499904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4557 (or 4547 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 16499904 is about 4062.0073855177. The cubic root of 16499904 is about 254.5816747469.

The spelling of 16499904 in words is "sixteen million, four hundred ninety-nine thousand, nine hundred four".