16404922 has 4 divisors (see below), whose sum is σ = 24607386. Its totient is φ = 8202460.

The previous prime is 16404863. The next prime is 16404937. The reversal of 16404922 is 22940461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22940461 = 179 ⋅128159.

It can be written as a sum of positive squares in only one way, i.e., 14814801 + 1590121 = 3849^2 + 1261^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4101229 + ... + 4101232.

Almost surely, 2^16404922 is an apocalyptic number.

16404922 is a deficient number, since it is larger than the sum of its proper divisors (8202464).

16404922 is an equidigital number, since it uses as much as digits as its factorization.

16404922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8202463.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 16404922 is about 4050.2990013084. The cubic root of 16404922 is about 254.0922330220.

The spelling of 16404922 in words is "sixteen million, four hundred four thousand, nine hundred twenty-two".