2289878 has 4 divisors (see below), whose sum is σ = 3434820. Its totient is φ = 1144938.

The previous prime is 2289871. The next prime is 2289901. The reversal of 2289878 is 8789822.

2289878 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8789822 = 2 ⋅4394911.

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 as a sum of consecutive naturals, namely, 572468 + ... + 572471.

It is an arithmetic number, because the mean of its divisors is an integer number (858705).

2^2289878 is an apocalyptic number.

2289878 is a deficient number, since it is larger than the sum of its proper divisors (1144942).

2289878 is a wasteful number, since it uses less digits than its factorization.

2289878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144941.

The product of its digits is 129024, while the sum is 44.

The square root of 2289878 is about 1513.2342845706. The cubic root of 2289878 is about 131.8066882639.

The spelling of 2289878 in words is "two million, two hundred eighty-nine thousand, eight hundred seventy-eight".