686521060 has 48 divisors (see below), whose sum is σ = 1510387200. Its totient is φ = 261765504.

The previous prime is 686521049. The next prime is 686521063. The reversal of 686521060 is 60125686.

It is a super-2 number, since 2×686521060² = 942622331647047200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686521063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38329 + ... + 53311.

It is an arithmetic number, because the mean of its divisors is an integer number (31466400).

Almost surely, 2^686521060 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 686521060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (755193600).

686521060 is an abundant number, since it is smaller than the sum of its proper divisors (823866140).

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

686521060 is a wasteful number, since it uses less digits than its factorization.

686521060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15100 (or 15098 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 686521060 is about 26201.5469008988. The cubic root of 686521060 is about 882.1679758503.

The spelling of 686521060 in words is "six hundred eighty-six million, five hundred twenty-one thousand, sixty".