686511360 has 216 divisors, whose sum is σ = 2479486464. Its totient is φ = 175042560.

The previous prime is 686511311. The next prime is 686511373. The reversal of 686511360 is 63115686.

It is a happy number.

686511360 is a `hidden beast` number, since 6 + 86 + 511 + 3 + 60 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 263665 + ... + 266255.

It is an arithmetic number, because the mean of its divisors is an integer number (11479104).

Almost surely, 2^686511360 is an apocalyptic number.

686511360 is a gapful number since it is divisible by the number (60) 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 686511360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1239743232).

686511360 is an abundant number, since it is smaller than the sum of its proper divisors (1792975104).

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

686511360 is a wasteful number, since it uses less digits than its factorization.

686511360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2641 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 686511360 is about 26201.3617966700. The cubic root of 686511360 is about 882.1638210519.

It can be divided in two parts, 6865 and 11360, that added together give a square (18225 = 135²).

The spelling of 686511360 in words is "six hundred eighty-six million, five hundred eleven thousand, three hundred sixty".