520256740 has 12 divisors (see below), whose sum is σ = 1092539196. Its totient is φ = 208102688.

The previous prime is 520256719. The next prime is 520256747. The reversal of 520256740 is 47652025.

It can be written as a sum of positive squares in 2 ways, for example, as 273703936 + 246552804 = 16544^2 + 15702^2 .

It is not an unprimeable number, because it can be changed into a prime (520256747) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13006399 + ... + 13006438.

It is an arithmetic number, because the mean of its divisors is an integer number (91044933).

Almost surely, 2^520256740 is an apocalyptic number.

It is an amenable number.

520256740 is an abundant number, since it is smaller than the sum of its proper divisors (572282456).

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

520256740 is a wasteful number, since it uses less digits than its factorization.

520256740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26012846 (or 26012844 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 520256740 is about 22809.1372041995. The cubic root of 520256740 is about 804.2774736778.

The spelling of 520256740 in words is "five hundred twenty million, two hundred fifty-six thousand, seven hundred forty".