17990814 has 16 divisors (see below), whose sum is σ = 36102528. Its totient is φ = 5976792.

The previous prime is 17990809. The next prime is 17990821. The reversal of 17990814 is 41809971.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3042 + ... + 6725.

It is an arithmetic number, because the mean of its divisors is an integer number (2256408).

Almost surely, 2^17990814 is an apocalyptic number.

17990814 is an abundant number, since it is smaller than the sum of its proper divisors (18111714).

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

17990814 is a wasteful number, since it uses less digits than its factorization.

17990814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10079.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 17990814 is about 4241.5579684828. The cubic root of 17990814 is about 262.0295501118.

The spelling of 17990814 in words is "seventeen million, nine hundred ninety thousand, eight hundred fourteen".