16640408 has 16 divisors (see below), whose sum is σ = 32557680. Its totient is φ = 7958368.

The previous prime is 16640401. The next prime is 16640411. The reversal of 16640408 is 80404661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16640401) 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, 45035 + ... + 45402.

It is an arithmetic number, because the mean of its divisors is an integer number (2034855).

Almost surely, 2^16640408 is an apocalyptic number.

It is an amenable number.

16640408 is a deficient number, since it is larger than the sum of its proper divisors (15917272).

16640408 is a wasteful number, since it uses less digits than its factorization.

16640408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90466 (or 90462 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 16640408 is about 4079.2656201821. The cubic root of 16640408 is about 255.3022585253.

The spelling of 16640408 in words is "sixteen million, six hundred forty thousand, four hundred eight".