90390224 has 20 divisors (see below), whose sum is σ = 185433444. Its totient is φ = 42536448.

The previous prime is 90390221. The next prime is 90390233. The reversal of 90390224 is 42209309.

It can be written as a sum of positive squares in 2 ways, for example, as 51552400 + 38837824 = 7180^2 + 6232^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90390221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165887 + ... + 166430.

Almost surely, 2^90390224 is an apocalyptic number.

It is an amenable number.

90390224 is an abundant number, since it is smaller than the sum of its proper divisors (95043220).

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

90390224 is a wasteful number, since it uses less digits than its factorization.

90390224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332342 (or 332336 counting only the distinct ones).

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

The square root of 90390224 is about 9507.3773460403. The cubic root of 90390224 is about 448.7872266301.

The spelling of 90390224 in words is "ninety million, three hundred ninety thousand, two hundred twenty-four".