90985584 has 20 divisors (see below), whose sum is σ = 235046216. Its totient is φ = 30328512.

The previous prime is 90985567. The next prime is 90985591. The reversal of 90985584 is 48558909.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1895533 = 90985584 / (9 + 0 + 9 + 8 + 5 + 5 + 8 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 947719 + ... + 947814.

Almost surely, 2^90985584 is an apocalyptic number.

It is an amenable number.

90985584 is an abundant number, since it is smaller than the sum of its proper divisors (144060632).

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

90985584 is a wasteful number, since it uses less digits than its factorization.

90985584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895544 (or 1895538 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 90985584 is about 9538.6363805315. The cubic root of 90985584 is about 449.7703915062.

The spelling of 90985584 in words is "ninety million, nine hundred eighty-five thousand, five hundred eighty-four".