520347740 has 24 divisors (see below), whose sum is σ = 1192069872. Its totient is φ = 189217280.

The previous prime is 520347721. The next prime is 520347749. The reversal of 520347740 is 47743025.

It is a junction number, because it is equal to n+sod(n) for n = 520347697 and 520347706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520347749) 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, 1182389 + ... + 1182828.

It is an arithmetic number, because the mean of its divisors is an integer number (49669578).

Almost surely, 2^520347740 is an apocalyptic number.

It is an amenable number.

520347740 is an abundant number, since it is smaller than the sum of its proper divisors (671722132).

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

520347740 is a wasteful number, since it uses less digits than its factorization.

520347740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2365237 (or 2365235 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The square root of 520347740 is about 22811.1319315811. The cubic root of 520347740 is about 804.3243639775.

The spelling of 520347740 in words is "five hundred twenty million, three hundred forty-seven thousand, seven hundred forty".