90358820 has 48 divisors (see below), whose sum is σ = 193393200. Its totient is φ = 35458560.

The previous prime is 90358819. The next prime is 90358823. The reversal of 90358820 is 2885309.

It can be written as a sum of positive squares in 8 ways, for example, as 222784 + 90136036 = 472^2 + 9494^2 .

It is not an unprimeable number, because it can be changed into a prime (90358823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 394466 + ... + 394694.

It is an arithmetic number, because the mean of its divisors is an integer number (4029025).

Almost surely, 2^90358820 is an apocalyptic number.

It is an amenable number.

90358820 is an abundant number, since it is smaller than the sum of its proper divisors (103034380).

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

90358820 is a wasteful number, since it uses less digits than its factorization.

90358820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 90358820 is about 9505.7256430006. The cubic root of 90358820 is about 448.7352470172.

The spelling of 90358820 in words is "ninety million, three hundred fifty-eight thousand, eight hundred twenty".