2685857856 has 112 divisors (see below), whose sum is σ = 8002633728. Its totient is φ = 787622400.

The previous prime is 2685857831. The next prime is 2685857857. The reversal of 2685857856 is 6587585862.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2685857856.

It is not an unprimeable number, because it can be changed into a prime (2685857857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44961 + ... + 85983.

Almost surely, 2^2685857856 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 2685857856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4001316864).

2685857856 is an abundant number, since it is smaller than the sum of its proper divisors (5316775872).

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

2685857856 is a wasteful number, since it uses less digits than its factorization.

2685857856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41080 (or 41070 counting only the distinct ones).

The product of its digits is 32256000, while the sum is 60.

The square root of 2685857856 is about 51825.2627200287. The cubic root of 2685857856 is about 1390.0412071354.

The spelling of 2685857856 in words is "two billion, six hundred eighty-five million, eight hundred fifty-seven thousand, eight hundred fifty-six".