520023740 has 48 divisors (see below), whose sum is σ = 1112348160. Its totient is φ = 204180480.

The previous prime is 520023739. The next prime is 520023793. The reversal of 520023740 is 47320025.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245285 + ... + 247395.

It is an arithmetic number, because the mean of its divisors is an integer number (23173920).

Almost surely, 2^520023740 is an apocalyptic number.

It is an amenable number.

520023740 is an abundant number, since it is smaller than the sum of its proper divisors (592324420).

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

520023740 is a wasteful number, since it uses less digits than its factorization.

520023740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2342 (or 2340 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 23.

The square root of 520023740 is about 22804.0290299763. The cubic root of 520023740 is about 804.1573889713.

Adding to 520023740 its reverse (47320025), we get a palindrome (567343765).

The spelling of 520023740 in words is "five hundred twenty million, twenty-three thousand, seven hundred forty".