686055744 has 280 divisors, whose sum is σ = 2270382048. Its totient is φ = 203074560.

The previous prime is 686055653. The next prime is 686055793. The reversal of 686055744 is 447550686.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 686055744.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3022159 + ... + 3022385.

Almost surely, 2^686055744 is an apocalyptic number.

686055744 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 686055744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135191024).

686055744 is an abundant number, since it is smaller than the sum of its proper divisors (1584326304).

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

686055744 is a wasteful number, since it uses less digits than its factorization.

686055744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 686055744 is about 26192.6658437052. The cubic root of 686055744 is about 881.9686230682.

The spelling of 686055744 in words is "six hundred eighty-six million, fifty-five thousand, seven hundred forty-four".