822668728 has 16 divisors (see below), whose sum is σ = 1762861680. Its totient is φ = 352572288.

The previous prime is 822668701. The next prime is 822668729. The reversal of 822668728 is 827866228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822668729) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7345201 + ... + 7345312.

It is an arithmetic number, because the mean of its divisors is an integer number (110178855).

Almost surely, 2^822668728 is an apocalyptic number.

It is an amenable number.

822668728 is an abundant number, since it is smaller than the sum of its proper divisors (940192952).

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

822668728 is a wasteful number, since it uses less digits than its factorization.

822668728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14690526 (or 14690522 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 822668728 is about 28682.2022864354. The cubic root of 822668728 is about 937.0044705238.

The spelling of 822668728 in words is "eight hundred twenty-two million, six hundred sixty-eight thousand, seven hundred twenty-eight".