2289869 has 6 divisors (see below), whose sum is σ = 2377290. Its totient is φ = 2203040.

The previous prime is 2289863. The next prime is 2289871. The reversal of 2289869 is 9689822.

2289869 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 697225 + 1592644 = 835^2 + 1262^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2289869 is a prime.

It is a super-2 number, since 2×2289869² = 10487000074322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289863) 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 5 ways as a sum of consecutive naturals, for example, 8009 + ... + 8289.

It is an arithmetic number, because the mean of its divisors is an integer number (396215).

2^2289869 is an apocalyptic number.

2289869 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2289869 is a deficient number, since it is larger than the sum of its proper divisors (87421).

2289869 is an frugal number, since it uses more digits than its factorization.

2289869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591 (or 310 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 2289869 is about 1513.2313108048. The cubic root of 2289869 is about 131.8065155820.

The spelling of 2289869 in words is "two million, two hundred eighty-nine thousand, eight hundred sixty-nine".