520855040 has 40 divisors (see below), whose sum is σ = 1248837480. Its totient is φ = 208340992.

The previous prime is 520855039. The next prime is 520855043. The reversal of 520855040 is 40558025.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 520854994 and 520855012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520855043) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 99170 + ... + 104289.

It is an arithmetic number, because the mean of its divisors is an integer number (31220937).

Almost surely, 2^520855040 is an apocalyptic number.

It is an amenable number.

520855040 is an abundant number, since it is smaller than the sum of its proper divisors (727982440).

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

520855040 is an equidigital number, since it uses as much as digits as its factorization.

520855040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203482 (or 203466 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 520855040 is about 22822.2487936662. The cubic root of 520855040 is about 804.5856643794.

The spelling of 520855040 in words is "five hundred twenty million, eight hundred fifty-five thousand, forty".