685018760 has 64 divisors (see below), whose sum is σ = 1568257200. Its totient is φ = 269254656.

The previous prime is 685018727. The next prime is 685018771. The reversal of 685018760 is 67810586.

It can be written as a sum of positive squares in 8 ways, for example, as 227828836 + 457189924 = 15094^2 + 21382^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 686582 + ... + 687578.

Almost surely, 2^685018760 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 685018760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784128600).

685018760 is an abundant number, since it is smaller than the sum of its proper divisors (883238440).

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

685018760 is a wasteful number, since it uses less digits than its factorization.

685018760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 1286 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 685018760 is about 26172.8630455287. The cubic root of 685018760 is about 881.5240291945.

The spelling of 685018760 in words is "six hundred eighty-five million, eighteen thousand, seven hundred sixty".