90333820 has 12 divisors (see below), whose sum is σ = 189701064. Its totient is φ = 36133520.

The previous prime is 90333791. The next prime is 90333821. The reversal of 90333820 is 2833309.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90333821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2258326 + ... + 2258365.

It is an arithmetic number, because the mean of its divisors is an integer number (15808422).

Almost surely, 2^90333820 is an apocalyptic number.

It is an amenable number.

90333820 is an abundant number, since it is smaller than the sum of its proper divisors (99367244).

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

90333820 is a wasteful number, since it uses less digits than its factorization.

90333820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4516700 (or 4516698 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 90333820 is about 9504.4105551055. The cubic root of 90333820 is about 448.6938586357.

The spelling of 90333820 in words is "ninety million, three hundred thirty-three thousand, eight hundred twenty".