90690684 has 24 divisors (see below), whose sum is σ = 241842048. Its totient is φ = 25911600.

The previous prime is 90690661. The next prime is 90690703. The reversal of 90690684 is 48609609.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 539742 + ... + 539909.

It is an arithmetic number, because the mean of its divisors is an integer number (10076752).

Almost surely, 2^90690684 is an apocalyptic number.

It is an amenable number.

90690684 is an abundant number, since it is smaller than the sum of its proper divisors (151151364).

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

90690684 is a wasteful number, since it uses less digits than its factorization.

90690684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079665 (or 1079663 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 90690684 is about 9523.1656501397. The cubic root of 90690684 is about 449.2839377138.

The spelling of 90690684 in words is "ninety million, six hundred ninety thousand, six hundred eighty-four".