2788271 has 4 divisors (see below), whose sum is σ = 2802912. Its totient is φ = 2773632.

The previous prime is 2788217. The next prime is 2788273. The reversal of 2788271 is 1728872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2788271 - 2¹⁸ = 2526127 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 (2788273) 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, 7031 + ... + 7416.

It is an arithmetic number, because the mean of its divisors is an integer number (700728).

2^2788271 is an apocalyptic number.

2788271 is a deficient number, since it is larger than the sum of its proper divisors (14641).

2788271 is a wasteful number, since it uses less digits than its factorization.

2788271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14640.

The product of its digits is 12544, while the sum is 35.

The square root of 2788271 is about 1669.8116660270. The cubic root of 2788271 is about 140.7488949937.

The spelling of 2788271 in words is "two million, seven hundred eighty-eight thousand, two hundred seventy-one".