2788891 has 8 divisors (see below), whose sum is σ = 3202560. Its totient is φ = 2379048.

The previous prime is 2788889. The next prime is 2788927. The reversal of 2788891 is 1988872.

2788891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2788891 - 2¹ = 2788889 is a prime.

It is a Duffinian number.

2788891 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 840 + ... + 2506.

It is an arithmetic number, because the mean of its divisors is an integer number (400320).

2^2788891 is an apocalyptic number.

2788891 is a deficient number, since it is larger than the sum of its proper divisors (413669).

2788891 is a wasteful number, since it uses less digits than its factorization.

2788891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1913.

The product of its digits is 64512, while the sum is 43.

The square root of 2788891 is about 1669.9973053870. The cubic root of 2788891 is about 140.7593265296.

The spelling of 2788891 in words is "two million, seven hundred eighty-eight thousand, eight hundred ninety-one".