2685779208 has 160 divisors (see below), whose sum is σ = 8716181760. Its totient is φ = 756760320.

The previous prime is 2685779191. The next prime is 2685779237. The reversal of 2685779208 is 8029775862.

It is a happy number.

2685779208 is a `hidden beast` number, since 2 + 68 + 577 + 9 + 2 + 0 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 327073 + ... + 335183.

It is an arithmetic number, because the mean of its divisors is an integer number (54476136).

Almost surely, 2^2685779208 is an apocalyptic number.

2685779208 is a gapful number since it is divisible by the number (28) 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 2685779208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4358090880).

2685779208 is an abundant number, since it is smaller than the sum of its proper divisors (6030402552).

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

2685779208 is a wasteful number, since it uses less digits than its factorization.

2685779208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8209 (or 8196 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The square root of 2685779208 is about 51824.5039339500. The cubic root of 2685779208 is about 1390.0276391516.

The spelling of 2685779208 in words is "two billion, six hundred eighty-five million, seven hundred seventy-nine thousand, two hundred eight".