822895678728 has 36 divisors (see below), whose sum is σ = 2228696643615. Its totient is φ = 274295993808.

The previous prime is 822895678679. The next prime is 822895678753. The reversal of 822895678728 is 827876598228.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

822895678728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 411447839364 + 411447839364 = 641442^2 + 641442^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=641442.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7643851 + ... + 7750757.

Almost surely, 2^822895678728 is an apocalyptic number.

It is an amenable number.

822895678728 is an abundant number, since it is smaller than the sum of its proper divisors (1405800964887).

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

822895678728 is an frugal number, since it uses more digits than its factorization.

822895678728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213826 (or 106912 counting only the distinct ones).

The product of its digits is 433520640, while the sum is 72.

Multiplying 822895678728 by its sum of digits (72), we get a square (59248488868416 = 7697304²).

822895678728 divided by its sum of digits (72) gives a square (11429106649 = 106907²).

The spelling of 822895678728 in words is "eight hundred twenty-two billion, eight hundred ninety-five million, six hundred seventy-eight thousand, seven hundred twenty-eight".