520753540 has 24 divisors (see below), whose sum is σ = 1123140312. Its totient is φ = 202671360.

The previous prime is 520753481. The next prime is 520753613. The reversal of 520753540 is 45357025.

It can be written as a sum of positive squares in 4 ways, for example, as 194156356 + 326597184 = 13934^2 + 18072^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 351121 + ... + 352600.

It is an arithmetic number, because the mean of its divisors is an integer number (46797513).

Almost surely, 2^520753540 is an apocalyptic number.

It is an amenable number.

520753540 is an abundant number, since it is smaller than the sum of its proper divisors (602386772).

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

520753540 is a wasteful number, since it uses less digits than its factorization.

520753540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703767 (or 703765 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 520753540 is about 22820.0249780757. The cubic root of 520753540 is about 804.5333972776.

The spelling of 520753540 in words is "five hundred twenty million, seven hundred fifty-three thousand, five hundred forty".