16399408 has 10 divisors (see below), whose sum is σ = 31773884. Its totient is φ = 8199696.

The previous prime is 16399393. The next prime is 16399421. The reversal of 16399408 is 80499361.

16399408 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 as a sum of consecutive naturals, namely, 512466 + ... + 512497.

Almost surely, 2^16399408 is an apocalyptic number.

It is an amenable number.

16399408 is a deficient number, since it is larger than the sum of its proper divisors (15374476).

16399408 is a wasteful number, since it uses less digits than its factorization.

16399408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1024971 (or 1024965 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 16399408 is about 4049.6182536135. The cubic root of 16399408 is about 254.0637614536.

It can be divided in two parts, 16399 and 408, that added together give a 5-th power (16807 = 7⁵).

The spelling of 16399408 in words is "sixteen million, three hundred ninety-nine thousand, four hundred eight".