17990128 has 20 divisors (see below), whose sum is σ = 37537528. Its totient is φ = 8303040.

The previous prime is 17990113. The next prime is 17990149. The reversal of 17990128 is 82109971.

It is a congruent number.

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, 43038 + ... + 43453.

Almost surely, 2^17990128 is an apocalyptic number.

It is an amenable number.

17990128 is an abundant number, since it is smaller than the sum of its proper divisors (19547400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17990128 is a wasteful number, since it uses less digits than its factorization.

17990128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86512 (or 86506 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 17990128 is about 4241.4771011995. The cubic root of 17990128 is about 262.0262196241.

The spelling of 17990128 in words is "seventeen million, nine hundred ninety thousand, one hundred twenty-eight".