685551360 has 288 divisors, whose sum is σ = 2439456768. Its totient is φ = 162938880.

The previous prime is 685551341. The next prime is 685551371. The reversal of 685551360 is 63155586.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1547299 + ... + 1547741.

It is an arithmetic number, because the mean of its divisors is an integer number (8470336).

Almost surely, 2^685551360 is an apocalyptic number.

685551360 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 685551360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1219728384).

685551360 is an abundant number, since it is smaller than the sum of its proper divisors (1753905408).

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

685551360 is a wasteful number, since it uses less digits than its factorization.

685551360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511 (or 497 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 39.

The square root of 685551360 is about 26183.0357292656. The cubic root of 685551360 is about 881.7524307603.

The spelling of 685551360 in words is "six hundred eighty-five million, five hundred fifty-one thousand, three hundred sixty".