90404586 has 20 divisors (see below), whose sum is σ = 202573602. Its totient is φ = 30134808.

The previous prime is 90404581. The next prime is 90404597. The reversal of 90404586 is 68540409.

It can be written as a sum of positive squares in only one way, i.e., 59768361 + 30636225 = 7731^2 + 5535^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 90404586.

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 9 ways as a sum of consecutive naturals, for example, 278865 + ... + 279188.

Almost surely, 2^90404586 is an apocalyptic number.

90404586 is an abundant number, since it is smaller than the sum of its proper divisors (112169016).

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

90404586 is a wasteful number, since it uses less digits than its factorization.

90404586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558067 (or 558058 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 90404586 is about 9508.1326242328. The cubic root of 90404586 is about 448.8109944689.

The spelling of 90404586 in words is "ninety million, four hundred four thousand, five hundred eighty-six".