823768772 has 12 divisors (see below), whose sum is σ = 1442782656. Its totient is φ = 411545160.

The previous prime is 823768753. The next prime is 823768793. The reversal of 823768772 is 277867328.

It is a self number, because there is not a number n which added to its sum of digits gives 823768772.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79304 + ... + 89087.

It is an arithmetic number, because the mean of its divisors is an integer number (120231888).

Almost surely, 2^823768772 is an apocalyptic number.

It is an amenable number.

823768772 is a deficient number, since it is larger than the sum of its proper divisors (619013884).

823768772 is a wasteful number, since it uses less digits than its factorization.

823768772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169618 (or 169616 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 50.

The square root of 823768772 is about 28701.3723016862. The cubic root of 823768772 is about 937.4219277682.

The spelling of 823768772 in words is "eight hundred twenty-three million, seven hundred sixty-eight thousand, seven hundred seventy-two".