2291289 has 48 divisors (see below), whose sum is σ = 4213440. Its totient is φ = 1088640.

The previous prime is 2291287. The next prime is 2291327. The reversal of 2291289 is 9821922.

It is a happy number.

It is not a de Polignac number, because 2291289 - 2¹ = 2291287 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2291281) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20967 + ... + 21075.

It is an arithmetic number, because the mean of its divisors is an integer number (87780).

2^2291289 is an apocalyptic number.

It is an amenable number.

2291289 is a deficient number, since it is larger than the sum of its proper divisors (1922151).

2291289 is a wasteful number, since it uses less digits than its factorization.

2291289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 143 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 2291289 is about 1513.7004327145. The cubic root of 2291289 is about 131.8337553610.

The spelling of 2291289 in words is "two million, two hundred ninety-one thousand, two hundred eighty-nine".