520778812 has 12 divisors (see below), whose sum is σ = 916821360. Its totient is φ = 258829856.

The previous prime is 520778801. The next prime is 520778831. The reversal of 520778812 is 218877025.

It is a congruent number.

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, 389137 + ... + 390472.

It is an arithmetic number, because the mean of its divisors is an integer number (76401780).

Almost surely, 2^520778812 is an apocalyptic number.

It is an amenable number.

520778812 is a deficient number, since it is larger than the sum of its proper divisors (396042548).

520778812 is a wasteful number, since it uses less digits than its factorization.

520778812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779780 (or 779778 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 520778812 is about 22820.5786955546. The cubic root of 520778812 is about 804.5464116484.

The spelling of 520778812 in words is "five hundred twenty million, seven hundred seventy-eight thousand, eight hundred twelve".