90220764 has 24 divisors (see below), whose sum is σ = 210767760. Its totient is φ = 30037504.

The previous prime is 90220747. The next prime is 90220771. The reversal of 90220764 is 46702209.

It is a happy number.

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, 7102 + ... + 15194.

It is an arithmetic number, because the mean of its divisors is an integer number (8781990).

Almost surely, 2^90220764 is an apocalyptic number.

It is an amenable number.

90220764 is an abundant number, since it is smaller than the sum of its proper divisors (120546996).

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

90220764 is a wasteful number, since it uses less digits than its factorization.

90220764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9029 (or 9027 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 90220764 is about 9498.4611385213. The cubic root of 90220764 is about 448.5065950318.

The spelling of 90220764 in words is "ninety million, two hundred twenty thousand, seven hundred sixty-four".