16638922 has 8 divisors (see below), whose sum is σ = 25070976. Its totient is φ = 8281932.

The previous prime is 16638917. The next prime is 16638931. The reversal of 16638922 is 22983661.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 18208 + ... + 19099.

It is an arithmetic number, because the mean of its divisors is an integer number (3133872).

Almost surely, 2^16638922 is an apocalyptic number.

16638922 is a deficient number, since it is larger than the sum of its proper divisors (8432054).

16638922 is a wasteful number, since it uses less digits than its factorization.

16638922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37532.

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

The square root of 16638922 is about 4079.0834754881. The cubic root of 16638922 is about 255.2946587427.

It can be divided in two parts, 1663 and 8922, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 16638922 in words is "sixteen million, six hundred thirty-eight thousand, nine hundred twenty-two".