520870728 has 32 divisors (see below), whose sum is σ = 1488202560. Its totient is φ = 148820160.

The previous prime is 520870723. The next prime is 520870741. The reversal of 520870728 is 827078025.

It is not an unprimeable number, because it can be changed into a prime (520870723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550043 + ... + 1550378.

It is an arithmetic number, because the mean of its divisors is an integer number (46506330).

Almost surely, 2^520870728 is an apocalyptic number.

It is an amenable number.

520870728 is an abundant number, since it is smaller than the sum of its proper divisors (967331832).

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

520870728 is a wasteful number, since it uses less digits than its factorization.

520870728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100437 (or 3100433 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 520870728 is about 22822.5924907755. The cubic root of 520870728 is about 804.5937422592.

The spelling of 520870728 in words is "five hundred twenty million, eight hundred seventy thousand, seven hundred twenty-eight".