90302320 has 20 divisors (see below), whose sum is σ = 209953080. Its totient is φ = 36120896.

The previous prime is 90302309. The next prime is 90302321. The reversal of 90302320 is 2320309.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90302321) 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, 564310 + ... + 564469.

It is an arithmetic number, because the mean of its divisors is an integer number (10497654).

Almost surely, 2^90302320 is an apocalyptic number.

It is an amenable number.

90302320 is an abundant number, since it is smaller than the sum of its proper divisors (119650760).

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

90302320 is a wasteful number, since it uses less digits than its factorization.

90302320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128792 (or 1128786 counting only the distinct ones).

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

The square root of 90302320 is about 9502.7532852327. The cubic root of 90302320 is about 448.6416984011.

Adding to 90302320 its reverse (2320309), we get a palindrome (92622629).

The spelling of 90302320 in words is "ninety million, three hundred two thousand, three hundred twenty".