822640916 has 6 divisors (see below), whose sum is σ = 1439621610. Its totient is φ = 411320456.

The previous prime is 822640901. The next prime is 822640957. The reversal of 822640916 is 619046228.

It can be written as a sum of positive squares in only one way, i.e., 818188816 + 4452100 = 28604^2 + 2110^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 822640916.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102830111 + ... + 102830118.

It is an arithmetic number, because the mean of its divisors is an integer number (239936935).

Almost surely, 2^822640916 is an apocalyptic number.

It is an amenable number.

822640916 is a deficient number, since it is larger than the sum of its proper divisors (616980694).

822640916 is a wasteful number, since it uses less digits than its factorization.

822640916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205660233 (or 205660231 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 822640916 is about 28681.7174520634. The cubic root of 822640916 is about 936.9939112868.

The spelling of 822640916 in words is "eight hundred twenty-two million, six hundred forty thousand, nine hundred sixteen".