90392389864 has 64 divisors (see below), whose sum is σ = 200598773760. Its totient is φ = 37367593920.

The previous prime is 90392389859. The next prime is 90392389883. The reversal of 90392389864 is 46898329309.

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, 448149 + ... + 617755.

It is an arithmetic number, because the mean of its divisors is an integer number (3134355840).

Almost surely, 2^90392389864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90392389864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100299386880).

90392389864 is an abundant number, since it is smaller than the sum of its proper divisors (110206383896).

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

90392389864 is a wasteful number, since it uses less digits than its factorization.

90392389864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169958 (or 169954 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 61.

The spelling of 90392389864 in words is "ninety billion, three hundred ninety-two million, three hundred eighty-nine thousand, eight hundred sixty-four".