822520728 has 24 divisors (see below), whose sum is σ = 2227660500. Its totient is φ = 274173552.

The previous prime is 822520717. The next prime is 822520789. The reversal of 822520728 is 827025228.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 822520692 and 822520701.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5711878 + ... + 5712021.

Almost surely, 2^822520728 is an apocalyptic number.

It is an amenable number.

822520728 is an abundant number, since it is smaller than the sum of its proper divisors (1405139772).

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

822520728 is a wasteful number, since it uses less digits than its factorization.

822520728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11423911 (or 11423904 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 822520728 is about 28679.6221732435. The cubic root of 822520728 is about 936.9482773993.

The spelling of 822520728 in words is "eight hundred twenty-two million, five hundred twenty thousand, seven hundred twenty-eight".