822972644 has 48 divisors (see below), whose sum is σ = 1589124096. Its totient is φ = 370608000.

The previous prime is 822972641. The next prime is 822972649. The reversal of 822972644 is 446279228.

It is a junction number, because it is equal to n+sod(n) for n = 822972595 and 822972604.

It is not an unprimeable number, because it can be changed into a prime (822972641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371789 + ... + 373995.

It is an arithmetic number, because the mean of its divisors is an integer number (33106752).

Almost surely, 2^822972644 is an apocalyptic number.

It is an amenable number.

822972644 is a deficient number, since it is larger than the sum of its proper divisors (766151452).

822972644 is a wasteful number, since it uses less digits than its factorization.

822972644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2396 (or 2394 counting only the distinct ones).

The product of its digits is 387072, while the sum is 44.

The square root of 822972644 is about 28687.4997864924. The cubic root of 822972644 is about 937.1198412195.

The spelling of 822972644 in words is "eight hundred twenty-two million, nine hundred seventy-two thousand, six hundred forty-four".