686040336 has 120 divisors (see below), whose sum is σ = 1963661024. Its totient is φ = 223534080.

The previous prime is 686040317. The next prime is 686040337. The reversal of 686040336 is 633040686.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 686040336.

It is not an unprimeable number, because it can be changed into a prime (686040337) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2035560 + ... + 2035896.

Almost surely, 2^686040336 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 686040336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (981830512).

686040336 is an abundant number, since it is smaller than the sum of its proper divisors (1277620688).

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

686040336 is a wasteful number, since it uses less digits than its factorization.

686040336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 686040336 is about 26192.3717139170. The cubic root of 686040336 is about 881.9620203616.

The spelling of 686040336 in words is "six hundred eighty-six million, forty thousand, three hundred thirty-six".