520109538 has 32 divisors (see below), whose sum is σ = 1131801216. Its totient is φ = 158381568.

The previous prime is 520109533. The next prime is 520109539. The reversal of 520109538 is 835901025.

It is a junction number, because it is equal to n+sod(n) for n = 520109499 and 520109508.

It is not an unprimeable number, because it can be changed into a prime (520109533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26806 + ... + 41937.

It is an arithmetic number, because the mean of its divisors is an integer number (35368788).

Almost surely, 2^520109538 is an apocalyptic number.

520109538 is an abundant number, since it is smaller than the sum of its proper divisors (611691678).

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

520109538 is a wasteful number, since it uses less digits than its factorization.

520109538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68858.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 520109538 is about 22805.9101550453. The cubic root of 520109538 is about 804.2016121456.

The spelling of 520109538 in words is "five hundred twenty million, one hundred nine thousand, five hundred thirty-eight".