16493904 has 60 divisors (see below), whose sum is σ = 52757536. Its totient is φ = 4712256.

The previous prime is 16493903. The next prime is 16493941. The reversal of 16493904 is 40939461.

16493904 is a `hidden beast` number, since 1 + 649 + 3 + 9 + 0 + 4 = 666.

It is a super-2 number, since 2×16493904² = 544097738322432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16493903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7174 + ... + 9189.

Almost surely, 2^16493904 is an apocalyptic number.

16493904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16493904 is an abundant number, since it is smaller than the sum of its proper divisors (36263632).

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

16493904 is a wasteful number, since it uses less digits than its factorization.

16493904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16384 (or 16375 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 16493904 is about 4061.2687672697. The cubic root of 16493904 is about 254.5508124413.

The spelling of 16493904 in words is "sixteen million, four hundred ninety-three thousand, nine hundred four".