99890032 has 80 divisors (see below), whose sum is σ = 220378752. Its totient is φ = 43464960.

The previous prime is 99890017. The next prime is 99890033. The reversal of 99890032 is 23009899.

It is a happy number.

It is a super-2 number, since 2×99890032² = 19956036985922048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99890033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506958 + ... + 507154.

Almost surely, 2^99890032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99890032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110189376).

99890032 is an abundant number, since it is smaller than the sum of its proper divisors (120488720).

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

99890032 is a wasteful number, since it uses less digits than its factorization.

99890032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 99890032 is about 9994.5000875482. The cubic root of 99890032 is about 463.9886788756.

The spelling of 99890032 in words is "ninety-nine million, eight hundred ninety thousand, thirty-two".