2289870 has 80 divisors (see below), whose sum is σ = 6743088. Its totient is φ = 552960.

The previous prime is 2289863. The next prime is 2289871. The reversal of 2289870 is 789822.

2289870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2289871) 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 39 ways as a sum of consecutive naturals, for example, 8782 + ... + 9038.

2^2289870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2289870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3371544).

2289870 is an abundant number, since it is smaller than the sum of its proper divisors (4453218).

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

2289870 is a wasteful number, since it uses less digits than its factorization.

2289870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 278 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 2289870 is about 1513.2316412235. The cubic root of 2289870 is about 131.8065347689.

The spelling of 2289870 in words is "two million, two hundred eighty-nine thousand, eight hundred seventy".