520140740 has 96 divisors (see below), whose sum is σ = 1277337600. Its totient is φ = 174245760.

The previous prime is 520140739. The next prime is 520140743. The reversal of 520140740 is 47041025.

It is not an unprimeable number, because it can be changed into a prime (520140743) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1448681 + ... + 1449039.

It is an arithmetic number, because the mean of its divisors is an integer number (13305600).

Almost surely, 2^520140740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520140740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (638668800).

520140740 is an abundant number, since it is smaller than the sum of its proper divisors (757196860).

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

520140740 is a wasteful number, since it uses less digits than its factorization.

520140740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 520140740 is about 22806.5942218473. The cubic root of 520140740 is about 804.2176934997.

Adding to 520140740 its reverse (47041025), we get a palindrome (567181765).

The spelling of 520140740 in words is "five hundred twenty million, one hundred forty thousand, seven hundred forty".