2789391 has 16 divisors (see below), whose sum is σ = 4088448. Its totient is φ = 1677600.

The previous prime is 2789387. The next prime is 2789399. The reversal of 2789391 is 1939872.

It is not a de Polignac number, because 2789391 - 2² = 2789387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2789399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5740 + ... + 6206.

It is an arithmetic number, because the mean of its divisors is an integer number (255528).

2^2789391 is an apocalyptic number.

2789391 is a deficient number, since it is larger than the sum of its proper divisors (1299057).

2789391 is a wasteful number, since it uses less digits than its factorization.

2789391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its digits is 27216, while the sum is 39.

The square root of 2789391 is about 1670.1469995183. The cubic root of 2789391 is about 140.7677379326.

It can be divided in two parts, 278 and 9391, that added together give a palindrome (9669).

The spelling of 2789391 in words is "two million, seven hundred eighty-nine thousand, three hundred ninety-one".