90840928 has 24 divisors (see below), whose sum is σ = 189364392. Its totient is φ = 42748416.

The previous prime is 90840917. The next prime is 90840929. The reversal of 90840928 is 82904809.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90840929) 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, 82950 + ... + 84037.

It is an arithmetic number, because the mean of its divisors is an integer number (7890183).

Almost surely, 2^90840928 is an apocalyptic number.

It is an amenable number.

90840928 is an abundant number, since it is smaller than the sum of its proper divisors (98523464).

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

90840928 is a wasteful number, since it uses less digits than its factorization.

90840928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167014 (or 167006 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 90840928 is about 9531.0507290645. The cubic root of 90840928 is about 449.5319050208.

The spelling of 90840928 in words is "ninety million, eight hundred forty thousand, nine hundred twenty-eight".