16399004 has 12 divisors (see below), whose sum is σ = 28727664. Its totient is φ = 8191104.

The previous prime is 16399003. The next prime is 16399013. The reversal of 16399004 is 40099361.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16399003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4844 + ... + 7500.

It is an arithmetic number, because the mean of its divisors is an integer number (2393972).

Almost surely, 2^16399004 is an apocalyptic number.

It is an amenable number.

16399004 is a deficient number, since it is larger than the sum of its proper divisors (12328660).

16399004 is a wasteful number, since it uses less digits than its factorization.

16399004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4204 (or 4202 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16399004 is about 4049.5683720614. The cubic root of 16399004 is about 254.0616751465.

The spelling of 16399004 in words is "sixteen million, three hundred ninety-nine thousand, four".