822774986840 has 64 divisors (see below), whose sum is σ = 1886872838400. Its totient is φ = 322801128832.

The previous prime is 822774986837. The next prime is 822774986849. The reversal of 822774986840 is 48689477228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822774986849) 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, 651989 + ... + 1438971.

It is an arithmetic number, because the mean of its divisors is an integer number (29482388100).

Almost surely, 2^822774986840 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 822774986840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943436419200).

822774986840 is an abundant number, since it is smaller than the sum of its proper divisors (1064097851560).

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

822774986840 is a wasteful number, since it uses less digits than its factorization.

822774986840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787496 (or 787492 counting only the distinct ones).

The product of its (nonzero) digits is 86704128, while the sum is 65.

The spelling of 822774986840 in words is "eight hundred twenty-two billion, seven hundred seventy-four million, nine hundred eighty-six thousand, eight hundred forty".