520140044 has 12 divisors (see below), whose sum is σ = 912624384. Its totient is φ = 259390224.

The previous prime is 520139959. The next prime is 520140053. The reversal of 520140044 is 440041025.

It is a junction number, because it is equal to n+sod(n) for n = 520139998 and 520140025.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168227 + ... + 171290.

It is an arithmetic number, because the mean of its divisors is an integer number (76052032).

Almost surely, 2^520140044 is an apocalyptic number.

It is an amenable number.

520140044 is a deficient number, since it is larger than the sum of its proper divisors (392484340).

520140044 is a wasteful number, since it uses less digits than its factorization.

520140044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339904 (or 339902 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 520140044 is about 22806.5789630975. The cubic root of 520140044 is about 804.2173347918.

Adding to 520140044 its reverse (440041025), we get a palindrome (960181069).

The spelling of 520140044 in words is "five hundred twenty million, one hundred forty thousand, forty-four".