16640944 has 10 divisors (see below), whose sum is σ = 32241860. Its totient is φ = 8320464.

The previous prime is 16640933. The next prime is 16640951. The reversal of 16640944 is 44904661.

It is a super-2 number, since 2×16640944² = 553842034422272, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 520014 + ... + 520045.

It is an arithmetic number, because the mean of its divisors is an integer number (3224186).

Almost surely, 2^16640944 is an apocalyptic number.

It is an amenable number.

16640944 is a deficient number, since it is larger than the sum of its proper divisors (15600916).

16640944 is a wasteful number, since it uses less digits than its factorization.

16640944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040067 (or 1040061 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 16640944 is about 4079.3313177529. The cubic root of 16640944 is about 255.3049996548.

The spelling of 16640944 in words is "sixteen million, six hundred forty thousand, nine hundred forty-four".