16639268 has 12 divisors (see below), whose sum is σ = 29223600. Its totient is φ = 8289672.

The previous prime is 16639247. The next prime is 16639279. The reversal of 16639268 is 86293661.

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, 6218 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (2435300).

Almost surely, 2^16639268 is an apocalyptic number.

It is an amenable number.

16639268 is a deficient number, since it is larger than the sum of its proper divisors (12584332).

16639268 is a wasteful number, since it uses less digits than its factorization.

16639268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14986 (or 14984 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 16639268 is about 4079.1258867556. The cubic root of 16639268 is about 255.2964283152.

The spelling of 16639268 in words is "sixteen million, six hundred thirty-nine thousand, two hundred sixty-eight".