2808391968 has 36 divisors (see below), whose sum is σ = 7986365478. Its totient is φ = 936130560.

The previous prime is 2808391909. The next prime is 2808391981. The reversal of 2808391968 is 8691938082.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2776446864 + 31945104 = 52692^2 + 5652^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4875393 + ... + 4875968.

Almost surely, 2^2808391968 is an apocalyptic number.

It is an amenable number.

2808391968 is an abundant number, since it is smaller than the sum of its proper divisors (5177973510).

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

2808391968 is a wasteful number, since it uses less digits than its factorization.

2808391968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9751377 (or 9751366 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 2808391968 is about 52994.2635386133. The cubic root of 2808391968 is about 1410.8664540195.

The spelling of 2808391968 in words is "two billion, eight hundred eight million, three hundred ninety-one thousand, nine hundred sixty-eight".