686734244 has 48 divisors (see below), whose sum is σ = 1456858368. Its totient is φ = 276507648.

The previous prime is 686734229. The next prime is 686734267. The reversal of 686734244 is 442437686.

It is a junction number, because it is equal to n+sod(n) for n = 686734195 and 686734204.

It is an unprimeable number.

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, 390872 + ... + 392624.

It is an arithmetic number, because the mean of its divisors is an integer number (30351216).

Almost surely, 2^686734244 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 686734244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728429184).

686734244 is an abundant number, since it is smaller than the sum of its proper divisors (770124124).

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

686734244 is a wasteful number, since it uses less digits than its factorization.

686734244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604 (or 2602 counting only the distinct ones).

The product of its digits is 774144, while the sum is 44.

The square root of 686734244 is about 26205.6147418831. The cubic root of 686734244 is about 882.2592790142.

The spelling of 686734244 in words is "six hundred eighty-six million, seven hundred thirty-four thousand, two hundred forty-four".