2685322278 has 48 divisors (see below), whose sum is σ = 6170832720. Its totient is φ = 841033728.

The previous prime is 2685322247. The next prime is 2685322303. The reversal of 2685322278 is 8722235862.

It is a happy number.

2685322278 is a `hidden beast` number, since 26 + 8 + 532 + 22 + 78 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182326 + ... + 196502.

It is an arithmetic number, because the mean of its divisors is an integer number (128559015).

Almost surely, 2^2685322278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2685322278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3085416360).

2685322278 is an abundant number, since it is smaller than the sum of its proper divisors (3485510442).

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

2685322278 is a wasteful number, since it uses less digits than its factorization.

2685322278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14821 (or 14818 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 2685322278 is about 51820.0953106032. The cubic root of 2685322278 is about 1389.9488064923.

The spelling of 2685322278 in words is "two billion, six hundred eighty-five million, three hundred twenty-two thousand, two hundred seventy-eight".