686650734 has 96 divisors (see below), whose sum is σ = 1860468480. Its totient is φ = 177811200.

The previous prime is 686650619. The next prime is 686650771. The reversal of 686650734 is 437056686.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 686650734.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 680022 + ... + 681030.

It is an arithmetic number, because the mean of its divisors is an integer number (19379880).

Almost surely, 2^686650734 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686650734, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (930234240).

686650734 is an abundant number, since it is smaller than the sum of its proper divisors (1173817746).

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

686650734 is a wasteful number, since it uses less digits than its factorization.

686650734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526 (or 1523 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 686650734 is about 26204.0213326123. The cubic root of 686650734 is about 882.2235153207.

It can be divided in two parts, 6866 and 50734, that added together give a square (57600 = 240²).

The spelling of 686650734 in words is "six hundred eighty-six million, six hundred fifty thousand, seven hundred thirty-four".