2798994887 has 4 divisors (see below), whose sum is σ = 3014302200. Its totient is φ = 2583687576.

The previous prime is 2798994883. The next prime is 2798994889. The reversal of 2798994887 is 7884998972.

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

It is a cyclic number.

It is not a de Polignac number, because 2798994887 - 2² = 2798994883 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2798994887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2798994883) by changing a digit.

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, 107653637 + ... + 107653662.

It is an arithmetic number, because the mean of its divisors is an integer number (753575550).

Almost surely, 2^2798994887 is an apocalyptic number.

2798994887 is a deficient number, since it is larger than the sum of its proper divisors (215307313).

2798994887 is a wasteful number, since it uses less digits than its factorization.

2798994887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215307312.

The product of its digits is 146313216, while the sum is 71.

The square root of 2798994887 is about 52905.5279436847. The cubic root of 2798994887 is about 1409.2910754771.

The spelling of 2798994887 in words is "two billion, seven hundred ninety-eight million, nine hundred ninety-four thousand, eight hundred eighty-seven".