90311320 has 32 divisors (see below), whose sum is σ = 221674320. Its totient is φ = 32840320.

The previous prime is 90311303. The next prime is 90311321. The reversal of 90311320 is 2311309.

It is a super-2 number, since 2×90311320² = 16312269040284800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90311321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102187 + ... + 103066.

Almost surely, 2^90311320 is an apocalyptic number.

It is an amenable number.

90311320 is an abundant number, since it is smaller than the sum of its proper divisors (131363000).

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

90311320 is a wasteful number, since it uses less digits than its factorization.

90311320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205275 (or 205271 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 90311320 is about 9503.2268204016. The cubic root of 90311320 is about 448.6566025629.

Adding to 90311320 its reverse (2311309), we get a palindrome (92622629).

Subtracting from 90311320 its reverse (2311309), we obtain a triangular number (88000011 = T₁₃₂₆₆).

The spelling of 90311320 in words is "ninety million, three hundred eleven thousand, three hundred twenty".