2798391 has 8 divisors (see below), whose sum is σ = 3739120. Its totient is φ = 1861632.

The previous prime is 2798381. The next prime is 2798437. The reversal of 2798391 is 1938972.

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

It is not a de Polignac number, because 2798391 - 2⁵ = 2798359 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 7⁶ + 9 + 8⁷ + 3⁵ + 9⁵ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2798321) 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, 1701 + ... + 2913.

It is an arithmetic number, because the mean of its divisors is an integer number (467390).

2^2798391 is an apocalyptic number.

2798391 is a deficient number, since it is larger than the sum of its proper divisors (940729).

2798391 is a wasteful number, since it uses less digits than its factorization.

2798391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1985.

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

The square root of 2798391 is about 1672.8392032709. The cubic root of 2798391 is about 140.9189716024.

The spelling of 2798391 in words is "two million, seven hundred ninety-eight thousand, three hundred ninety-one".