2688210089 has 4 divisors (see below), whose sum is σ = 2688655956. Its totient is φ = 2687764224.

The previous prime is 2688210061. The next prime is 2688210127. The reversal of 2688210089 is 9800128862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1590414400 + 1097795689 = 39880^2 + 33133^2 .

It is a cyclic number.

It is not a de Polignac number, because 2688210089 - 2⁸ = 2688209833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2688210029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 213764 + ... + 225989.

It is an arithmetic number, because the mean of its divisors is an integer number (672163989).

Almost surely, 2^2688210089 is an apocalyptic number.

It is an amenable number.

2688210089 is a deficient number, since it is larger than the sum of its proper divisors (445867).

2688210089 is an equidigital number, since it uses as much as digits as its factorization.

2688210089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445866.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 2688210089 is about 51847.9516374562. The cubic root of 2688210089 is about 1390.4468809673.

The spelling of 2688210089 in words is "two billion, six hundred eighty-eight million, two hundred ten thousand, eighty-nine".