16638316 has 12 divisors (see below), whose sum is σ = 29226400. Its totient is φ = 8287920.

The previous prime is 16638301. The next prime is 16638317. The reversal of 16638316 is 61383661.

It is a happy number.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16638317) 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, 6591 + ... + 8758.

Almost surely, 2^16638316 is an apocalyptic number.

It is an amenable number.

16638316 is a deficient number, since it is larger than the sum of its proper divisors (12588084).

16638316 is a wasteful number, since it uses less digits than its factorization.

16638316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15624 (or 15622 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 16638316 is about 4079.0091934194. The cubic root of 16638316 is about 255.2915593744.

The spelling of 16638316 in words is "sixteen million, six hundred thirty-eight thousand, three hundred sixteen".