90821300 has 18 divisors (see below), whose sum is σ = 197082438. Its totient is φ = 36328480.

The previous prime is 90821299. The next prime is 90821329. The reversal of 90821300 is 312809.

It can be written as a sum of positive squares in 3 ways, for example, as 32512804 + 58308496 = 5702^2 + 7636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 454007 + ... + 454206.

Almost surely, 2^90821300 is an apocalyptic number.

It is an amenable number.

90821300 is an abundant number, since it is smaller than the sum of its proper divisors (106261138).

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

90821300 is a wasteful number, since it uses less digits than its factorization.

90821300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908227 (or 908220 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 90821300 is about 9530.0209863358. The cubic root of 90821300 is about 449.4995259013.

The spelling of 90821300 in words is "ninety million, eight hundred twenty-one thousand, three hundred".