2788191 has 12 divisors (see below), whose sum is σ = 4602832. Its totient is φ = 1593216.

The previous prime is 2788133. The next prime is 2788199. The reversal of 2788191 is 1918872.

It is not a de Polignac number, because 2788191 - 2¹⁷ = 2657119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2788199) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 22066 + ... + 22191.

2^2788191 is an apocalyptic number.

2788191 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2788191 is a deficient number, since it is larger than the sum of its proper divisors (1814641).

2788191 is a wasteful number, since it uses less digits than its factorization.

2788191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44270 (or 44267 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 2788191 is about 1669.7877110579. The cubic root of 2788191 is about 140.7475488764.

It can be divided in two parts, 27881 and 91, that added together give a palindrome (27972).

The spelling of 2788191 in words is "two million, seven hundred eighty-eight thousand, one hundred ninety-one".