520117420 has 24 divisors (see below), whose sum is σ = 1094089248. Its totient is φ = 207696000.

The previous prime is 520117393. The next prime is 520117427. The reversal of 520117420 is 24711025.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 520117391 and 520117400.

It is not an unprimeable number, because it can be changed into a prime (520117427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9616 + ... + 33655.

It is an arithmetic number, because the mean of its divisors is an integer number (45587052).

Almost surely, 2^520117420 is an apocalyptic number.

It is an amenable number.

520117420 is an abundant number, since it is smaller than the sum of its proper divisors (573971828).

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

520117420 is a wasteful number, since it uses less digits than its factorization.

520117420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43881 (or 43879 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 520117420 is about 22806.0829604735. The cubic root of 520117420 is about 804.2056745495.

Adding to 520117420 its reverse (24711025), we get a palindrome (544828445).

The spelling of 520117420 in words is "five hundred twenty million, one hundred seventeen thousand, four hundred twenty".