16639408 has 20 divisors (see below), whose sum is σ = 32408640. Its totient is φ = 8275904.

The previous prime is 16639391. The next prime is 16639411. The reversal of 16639408 is 80493661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 513 + ... + 5791.

It is an arithmetic number, because the mean of its divisors is an integer number (1620432).

Almost surely, 2^16639408 is an apocalyptic number.

It is an amenable number.

16639408 is a deficient number, since it is larger than the sum of its proper divisors (15769232).

16639408 is a wasteful number, since it uses less digits than its factorization.

16639408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484 (or 5478 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 16639408 is about 4079.1430472588. The cubic root of 16639408 is about 255.2971443203.

The spelling of 16639408 in words is "sixteen million, six hundred thirty-nine thousand, four hundred eight".