2798287 has 4 divisors (see below), whose sum is σ = 2801736. Its totient is φ = 2794840.

The previous prime is 2798281. The next prime is 2798293. The reversal of 2798287 is 7828972.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (2798281) and next prime (2798293).

It is a cyclic number.

It is not a de Polignac number, because 2798287 - 2¹⁵ = 2765519 is a prime.

It is a Duffinian number.

2798287 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2798281) 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 3 ways as a sum of consecutive naturals, for example, 237 + ... + 2377.

It is an arithmetic number, because the mean of its divisors is an integer number (700434).

2^2798287 is an apocalyptic number.

2798287 is a deficient number, since it is larger than the sum of its proper divisors (3449).

2798287 is a wasteful number, since it uses less digits than its factorization.

2798287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3448.

The product of its digits is 112896, while the sum is 43.

The square root of 2798287 is about 1672.8081181056. The cubic root of 2798287 is about 140.9172258665.

The spelling of 2798287 in words is "two million, seven hundred ninety-eight thousand, two hundred eighty-seven".