685780760 has 192 divisors, whose sum is σ = 1905500160. Its totient is φ = 217267200.

The previous prime is 685780759. The next prime is 685780769. The reversal of 685780760 is 67087586.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685780769) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14591057 + ... + 14591103.

It is an arithmetic number, because the mean of its divisors is an integer number (9924480).

Almost surely, 2^685780760 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 685780760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (952750080).

685780760 is an abundant number, since it is smaller than the sum of its proper divisors (1219719400).

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

685780760 is a wasteful number, since it uses less digits than its factorization.

685780760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 685780760 is about 26187.4160619180. The cubic root of 685780760 is about 881.8507708031.

The spelling of 685780760 in words is "six hundred eighty-five million, seven hundred eighty thousand, seven hundred sixty".