2680857728 has 32 divisors (see below), whose sum is σ = 5347579500. Its totient is φ = 1338720256.

The previous prime is 2680857719. The next prime is 2680857749. The reversal of 2680857728 is 8277580862.

It is a Cunningham number, because it is equal to 51777²-1.

It can be written as a sum of positive squares in 2 ways, for example, as 2058255424 + 622602304 = 45368^2 + 24952^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 2680857728.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90608 + ... + 116496.

Almost surely, 2^2680857728 is an apocalyptic number.

It is an amenable number.

2680857728 is a deficient number, since it is larger than the sum of its proper divisors (2666721772).

2680857728 is an equidigital number, since it uses as much as digits as its factorization.

2680857728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26712 (or 26700 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 53.

The square root of 2680857728 is about 51776.9999903432. Note that the first 5 decimals coincide. The cubic root of 2680857728 is about 1389.1780811050.

The spelling of 2680857728 in words is "two billion, six hundred eighty million, eight hundred fifty-seven thousand, seven hundred twenty-eight".