909898990 has 128 divisors (see below), whose sum is σ = 2328818688. Its totient is φ = 246343680.

The previous prime is 909898981. The next prime is 909899027. The reversal of 909898990 is 99898909.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 167497 + ... + 172843.

It is an arithmetic number, because the mean of its divisors is an integer number (18193896).

Almost surely, 2^909898990 is an apocalyptic number.

909898990 is an abundant number, since it is smaller than the sum of its proper divisors (1418919698).

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

909898990 is a wasteful number, since it uses less digits than its factorization.

909898990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5402.

The product of its (nonzero) digits is 3779136, while the sum is 61.

The square root of 909898990 is about 30164.5319870871. The cubic root of 909898990 is about 969.0162520886.

The spelling of 909898990 in words is "nine hundred nine million, eight hundred ninety-eight thousand, nine hundred ninety".