90020904 has 32 divisors (see below), whose sum is σ = 225529920. Its totient is φ = 29943296.

The previous prime is 90020897. The next prime is 90020911. The reversal of 90020904 is 40902009.

It is an interprime number because it is at equal distance from previous prime (90020897) and next prime (90020911).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8344 + ... + 15800.

It is an arithmetic number, because the mean of its divisors is an integer number (7047810).

Almost surely, 2^90020904 is an apocalyptic number.

It is an amenable number.

90020904 is an abundant number, since it is smaller than the sum of its proper divisors (135509016).

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

90020904 is a wasteful number, since it uses less digits than its factorization.

90020904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7969 (or 7965 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 90020904 is about 9487.9346540751. The cubic root of 90020904 is about 448.1751680012.

The spelling of 90020904 in words is "ninety million, twenty thousand, nine hundred four".