90840085 has 16 divisors (see below), whose sum is σ = 125424000. Its totient is φ = 61868736.

The previous prime is 90840077. The next prime is 90840149. The reversal of 90840085 is 58004809.

It is a cyclic number.

It is not a de Polignac number, because 90840085 - 2³ = 90840077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90840085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3495 + ... + 13924.

It is an arithmetic number, because the mean of its divisors is an integer number (7839000).

Almost surely, 2^90840085 is an apocalyptic number.

It is an amenable number.

90840085 is a deficient number, since it is larger than the sum of its proper divisors (34583915).

90840085 is a wasteful number, since it uses less digits than its factorization.

90840085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17580.

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 90840085 is about 9531.0065050864. The cubic root of 90840085 is about 449.5305144708.

The spelling of 90840085 in words is "ninety million, eight hundred forty thousand, eighty-five".