2289864 has 32 divisors (see below), whose sum is σ = 5807520. Its totient is φ = 752256.

The previous prime is 2289863. The next prime is 2289871. The reversal of 2289864 is 4689822.

It is not an unprimeable number, because it can be changed into a prime (2289863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1099 + ... + 2405.

It is an arithmetic number, because the mean of its divisors is an integer number (181485).

2^2289864 is an apocalyptic number.

2289864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2289864 is an abundant number, since it is smaller than the sum of its proper divisors (3517656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2289864 is a wasteful number, since it uses less digits than its factorization.

2289864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1389 (or 1385 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 2289864 is about 1513.2296587101. The cubic root of 2289864 is about 131.8064196474.

The spelling of 2289864 in words is "two million, two hundred eighty-nine thousand, eight hundred sixty-four".