2287391 has 8 divisors (see below), whose sum is σ = 2428800. Its totient is φ = 2148120.

The previous prime is 2287387. The next prime is 2287393. The reversal of 2287391 is 1937822.

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

It is a cyclic number.

It is not a de Polignac number, because 2287391 - 2² = 2287387 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 (2287393) 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, 2030 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (303600).

2^2287391 is an apocalyptic number.

2287391 is a deficient number, since it is larger than the sum of its proper divisors (141409).

2287391 is a wasteful number, since it uses less digits than its factorization.

2287391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069.

The product of its digits is 6048, while the sum is 32.

The square root of 2287391 is about 1512.4123115077. The cubic root of 2287391 is about 131.7589532639.

The spelling of 2287391 in words is "two million, two hundred eighty-seven thousand, three hundred ninety-one".