90831228 has 24 divisors (see below), whose sum is σ = 213169488. Its totient is φ = 30101376.

The previous prime is 90831193. The next prime is 90831269. The reversal of 90831228 is 82213809.

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 7 ways as a sum of consecutive naturals, for example, 19801 + ... + 23952.

It is an arithmetic number, because the mean of its divisors is an integer number (8882062).

Almost surely, 2^90831228 is an apocalyptic number.

It is an amenable number.

90831228 is an abundant number, since it is smaller than the sum of its proper divisors (122338260).

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

90831228 is a wasteful number, since it uses less digits than its factorization.

90831228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43933 (or 43931 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 90831228 is about 9530.5418523817. The cubic root of 90831228 is about 449.5159041029.

The spelling of 90831228 in words is "ninety million, eight hundred thirty-one thousand, two hundred twenty-eight".