90421584 has 40 divisors (see below), whose sum is σ = 254825952. Its totient is φ = 27400320.

The previous prime is 90421559. The next prime is 90421601. The reversal of 90421584 is 48512409.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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, 85099 + ... + 86154.

Almost surely, 2^90421584 is an apocalyptic number.

It is an amenable number.

90421584 is an abundant number, since it is smaller than the sum of its proper divisors (164404368).

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

90421584 is a wasteful number, since it uses less digits than its factorization.

90421584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171275 (or 171269 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 90421584 is about 9509.0264485908. The cubic root of 90421584 is about 448.8391214019.

The spelling of 90421584 in words is "ninety million, four hundred twenty-one thousand, five hundred eighty-four".