16401904 has 10 divisors (see below), whose sum is σ = 31778720. Its totient is φ = 8200944.

The previous prime is 16401887. The next prime is 16401911. The reversal of 16401904 is 40910461.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512544 + ... + 512575.

It is an arithmetic number, because the mean of its divisors is an integer number (3177872).

Almost surely, 2^16401904 is an apocalyptic number.

It is an amenable number.

16401904 is a deficient number, since it is larger than the sum of its proper divisors (15376816).

16401904 is a wasteful number, since it uses less digits than its factorization.

16401904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1025127 (or 1025121 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 16401904 is about 4049.9264190847. The cubic root of 16401904 is about 254.0766503533.

The spelling of 16401904 in words is "sixteen million, four hundred one thousand, nine hundred four".