990232220 has 12 divisors (see below), whose sum is σ = 2079487704. Its totient is φ = 396092880.

The previous prime is 990232219. The next prime is 990232273. The reversal of 990232220 is 22232099.

It is a super-2 number, since 2×990232220² = 1961119699052256800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24755786 + ... + 24755825.

It is an arithmetic number, because the mean of its divisors is an integer number (173290642).

Almost surely, 2^990232220 is an apocalyptic number.

It is an amenable number.

990232220 is an abundant number, since it is smaller than the sum of its proper divisors (1089255484).

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

990232220 is a wasteful number, since it uses less digits than its factorization.

990232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49511620 (or 49511618 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 990232220 is about 31467.9554467716. The cubic root of 990232220 is about 996.7334143704.

The spelling of 990232220 in words is "nine hundred ninety million, two hundred thirty-two thousand, two hundred twenty".