90385587 has 6 divisors (see below), whose sum is σ = 130556972. Its totient is φ = 60257052.

The previous prime is 90385573. The next prime is 90385609. The reversal of 90385587 is 78558309.

90385587 is a `hidden beast` number, since 90 + 3 + 8 + 558 + 7 = 666.

It is not a de Polignac number, because 90385587 - 2⁴ = 90385571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90385507) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5021413 + ... + 5021430.

Almost surely, 2^90385587 is an apocalyptic number.

90385587 is a deficient number, since it is larger than the sum of its proper divisors (40171385).

90385587 is a wasteful number, since it uses less digits than its factorization.

90385587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10042849 (or 10042846 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 90385587 is about 9507.1334796562. The cubic root of 90385587 is about 448.7795522679.

The spelling of 90385587 in words is "ninety million, three hundred eighty-five thousand, five hundred eighty-seven".