2678897684 has 12 divisors (see below), whose sum is σ = 4689400884. Its totient is φ = 1339068864.

The previous prime is 2678897651. The next prime is 2678897701. The reversal of 2678897684 is 4867988762.

It can be written as a sum of positive squares in 2 ways, for example, as 674544784 + 2004352900 = 25972^2 + 44770^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2678897684.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78827 + ... + 107570.

It is an arithmetic number, because the mean of its divisors is an integer number (390783407).

Almost surely, 2^2678897684 is an apocalyptic number.

It is an amenable number.

2678897684 is a deficient number, since it is larger than the sum of its proper divisors (2010503200).

2678897684 is a wasteful number, since it uses less digits than its factorization.

2678897684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189994 (or 189992 counting only the distinct ones).

The product of its digits is 65028096, while the sum is 65.

The square root of 2678897684 is about 51758.0687815919. The cubic root of 2678897684 is about 1388.8394439609.

The spelling of 2678897684 in words is "two billion, six hundred seventy-eight million, eight hundred ninety-seven thousand, six hundred eighty-four".