822891216 has 160 divisors (see below), whose sum is σ = 2589834240. Its totient is φ = 219912192.

The previous prime is 822891193. The next prime is 822891227. The reversal of 822891216 is 612198228.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529096 + ... + 530648.

It is an arithmetic number, because the mean of its divisors is an integer number (16186464).

Almost surely, 2^822891216 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 822891216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294917120).

822891216 is an abundant number, since it is smaller than the sum of its proper divisors (1766943024).

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

822891216 is a wasteful number, since it uses less digits than its factorization.

822891216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673 (or 1667 counting only the distinct ones).

The product of its digits is 27648, while the sum is 39.

The square root of 822891216 is about 28686.0805269734. The cubic root of 822891216 is about 937.0889328161.

The spelling of 822891216 in words is "eight hundred twenty-two million, eight hundred ninety-one thousand, two hundred sixteen".