822747072 has 112 divisors (see below), whose sum is σ = 2507357952. Its totient is φ = 233226240.

The previous prime is 822747047. The next prime is 822747089. The reversal of 822747072 is 270747228.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a self number, because there is not a number n which added to its sum of digits gives 822747072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173728 + ... + 178400.

Almost surely, 2^822747072 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 822747072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1253678976).

822747072 is an abundant number, since it is smaller than the sum of its proper divisors (1684610880).

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

822747072 is a wasteful number, since it uses less digits than its factorization.

822747072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826 (or 4816 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 822747072 is about 28683.5679788969. The cubic root of 822747072 is about 937.0342137021.

The spelling of 822747072 in words is "eight hundred twenty-two million, seven hundred forty-seven thousand, seventy-two".