2288391 has 8 divisors (see below), whose sum is σ = 3487104. Its totient is φ = 1307640.

The previous prime is 2288369. The next prime is 2288399. The reversal of 2288391 is 1938822.

2288391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2288391 - 2⁵ = 2288359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2288399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54465 + ... + 54506.

It is an arithmetic number, because the mean of its divisors is an integer number (435888).

2^2288391 is an apocalyptic number.

2288391 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2288391 is a deficient number, since it is larger than the sum of its proper divisors (1198713).

2288391 is a wasteful number, since it uses less digits than its factorization.

2288391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108981.

The product of its digits is 6912, while the sum is 33.

The square root of 2288391 is about 1512.7428730620. The cubic root of 2288391 is about 131.7781512289.

The spelling of 2288391 in words is "two million, two hundred eighty-eight thousand, three hundred ninety-one".