90404585 has 8 divisors (see below), whose sum is σ = 108655560. Its totient is φ = 72210304.

The previous prime is 90404581. The next prime is 90404597. The reversal of 90404585 is 58540409.

It can be written as a sum of positive squares in 4 ways, for example, as 458329 + 89946256 = 677^2 + 9484^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90404585 - 2² = 90404581 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90404581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10580 + ... + 17109.

It is an arithmetic number, because the mean of its divisors is an integer number (13581945).

Almost surely, 2^90404585 is an apocalyptic number.

It is an amenable number.

90404585 is a deficient number, since it is larger than the sum of its proper divisors (18250975).

90404585 is a wasteful number, since it uses less digits than its factorization.

90404585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28347.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 90404585 is about 9508.1325716462. The cubic root of 90404585 is about 448.8109928140.

The spelling of 90404585 in words is "ninety million, four hundred four thousand, five hundred eighty-five".