17990944 has 24 divisors (see below), whose sum is σ = 35655228. Its totient is φ = 8935680.

The previous prime is 17990941. The next prime is 17990953. The reversal of 17990944 is 44909971.

It can be written as a sum of positive squares in 2 ways, for example, as 17740944 + 250000 = 4212^2 + 500^2 .

It is a super-2 number, since 2×17990944² = 647348132022272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 17990944.

It is not an unprimeable number, because it can be changed into a prime (17990941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3234 + ... + 6814.

Almost surely, 2^17990944 is an apocalyptic number.

It is an amenable number.

17990944 is a deficient number, since it is larger than the sum of its proper divisors (17664284).

17990944 is a wasteful number, since it uses less digits than its factorization.

17990944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3748 (or 3740 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 17990944 is about 4241.5732930129. The cubic root of 17990944 is about 262.0301812443.

The spelling of 17990944 in words is "seventeen million, nine hundred ninety thousand, nine hundred forty-four".