90320320 has 56 divisors (see below), whose sum is σ = 227740464. Its totient is φ = 34000896.

The previous prime is 90320317. The next prime is 90320369. The reversal of 90320320 is 2302309.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2862 + ... + 13741.

It is an arithmetic number, because the mean of its divisors is an integer number (4066794).

Almost surely, 2^90320320 is an apocalyptic number.

It is an amenable number.

90320320 is an abundant number, since it is smaller than the sum of its proper divisors (137420144).

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

90320320 is a wasteful number, since it uses less digits than its factorization.

90320320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16637 (or 16627 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 90320320 is about 9503.7003319760. The cubic root of 90320320 is about 448.6715057345.

Adding to 90320320 its reverse (2302309), we get a palindrome (92622629).

The spelling of 90320320 in words is "ninety million, three hundred twenty thousand, three hundred twenty".