822446864 has 60 divisors (see below), whose sum is σ = 1667822940. Its totient is φ = 392832000.

The previous prime is 822446861. The next prime is 822446879. The reversal of 822446864 is 468644228.

It can be written as a sum of positive squares in 2 ways, for example, as 428821264 + 393625600 = 20708^2 + 19840^2 .

It is not an unprimeable number, because it can be changed into a prime (822446861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1368164 + ... + 1368764.

It is an arithmetic number, because the mean of its divisors is an integer number (27797049).

Almost surely, 2^822446864 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 822446864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (833911470).

822446864 is an abundant number, since it is smaller than the sum of its proper divisors (845376076).

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

822446864 is a wasteful number, since it uses less digits than its factorization.

822446864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760 (or 723 counting only the distinct ones).

The product of its digits is 589824, while the sum is 44.

The square root of 822446864 is about 28678.3344007284. The cubic root of 822446864 is about 936.9202299525.

The spelling of 822446864 in words is "eight hundred twenty-two million, four hundred forty-six thousand, eight hundred sixty-four".