2789871 has 8 divisors (see below), whose sum is σ = 4251264. Its totient is φ = 1594200.

The previous prime is 2789861. The next prime is 2789881. The reversal of 2789871 is 1789872.

It is an interprime number because it is at equal distance from previous prime (2789861) and next prime (2789881).

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

It is a de Polignac number, because none of the positive numbers 2^k-2789871 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789821) 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 7 ways as a sum of consecutive naturals, for example, 66405 + ... + 66446.

It is an arithmetic number, because the mean of its divisors is an integer number (531408).

2^2789871 is an apocalyptic number.

2789871 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2789871 is a deficient number, since it is larger than the sum of its proper divisors (1461393).

2789871 is a wasteful number, since it uses less digits than its factorization.

2789871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132861.

The product of its digits is 56448, while the sum is 42.

The square root of 2789871 is about 1670.2906932627. The cubic root of 2789871 is about 140.7758119338.

Subtracting from 2789871 its reverse (1789872), we obtain a palindrome (999999).

It can be divided in two parts, 27 and 89871, that added together give a palindrome (89898).

The spelling of 2789871 in words is "two million, seven hundred eighty-nine thousand, eight hundred seventy-one".