922640625 has 77 divisors (see below), whose sum is σ = 1729919263. Its totient is φ = 492075000.

The previous prime is 922640603. The next prime is 922640639. The reversal of 922640625 is 526046229.

The square root of 922640625 is 30375.

It is a perfect power (a square), and thus also a powerful number.

922640625 is a `hidden beast` number, since 9 + 2 + 2 + 640 + 6 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 808321761 + 114318864 = 28431^2 + 10692^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=5, B=45.

It is a de Polignac number, because none of the positive numbers 2^k-922640625 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 922640625.

It is an unprimeable number.

It is a polite number, since it can be written in 76 ways as a sum of consecutive naturals, for example, 184528123 + ... + 184528127.

Almost surely, 2^922640625 is an apocalyptic number.

922640625 is the 30375-th square number.

922640625 is the 15188-th centered octagonal number.

It is an amenable number.

922640625 is a deficient number, since it is larger than the sum of its proper divisors (807278638).

922640625 is an frugal number, since it uses more digits than its factorization.

922640625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60 (or 8 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The cubic root of 922640625 is about 973.5184599575.

Multiplying 922640625 by its sum of digits (36), we get a square (33215062500 = 182250²).

Multiplying 922640625 by its product of nonzero digits (51840), we get a 7-th power (47829690000000 = 90⁷).

The spelling of 922640625 in words is "nine hundred twenty-two million, six hundred forty thousand, six hundred twenty-five".