520689136 has 60 divisors (see below), whose sum is σ = 1113210000. Its totient is φ = 235755520.

The previous prime is 520689121. The next prime is 520689139. The reversal of 520689136 is 631986025.

It is a super-2 number, since 2×520689136² = 542234352696852992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520689139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 868965 + ... + 869563.

It is an arithmetic number, because the mean of its divisors is an integer number (18553500).

Almost surely, 2^520689136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520689136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (556605000).

520689136 is an abundant number, since it is smaller than the sum of its proper divisors (592520864).

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

520689136 is a wasteful number, since it uses less digits than its factorization.

520689136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1061 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 520689136 is about 22818.6138054002. The cubic root of 520689136 is about 804.5002291208.

The spelling of 520689136 in words is "five hundred twenty million, six hundred eighty-nine thousand, one hundred thirty-six".