820568732 has 24 divisors (see below), whose sum is σ = 1520870400. Its totient is φ = 386300016.

The previous prime is 820568669. The next prime is 820568741. The reversal of 820568732 is 237865028.

It is a self number, because there is not a number n which added to its sum of digits gives 820568732.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20732 + ... + 45507.

It is an arithmetic number, because the mean of its divisors is an integer number (63369600).

Almost surely, 2^820568732 is an apocalyptic number.

It is an amenable number.

820568732 is a deficient number, since it is larger than the sum of its proper divisors (700301668).

820568732 is a wasteful number, since it uses less digits than its factorization.

820568732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66425 (or 66423 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 820568732 is about 28645.5708967372. The cubic root of 820568732 is about 936.2065056209.

The spelling of 820568732 in words is "eight hundred twenty million, five hundred sixty-eight thousand, seven hundred thirty-two".