2878389 has 16 divisors (see below), whose sum is σ = 4515840. Its totient is φ = 1805760.

The previous prime is 2878373. The next prime is 2878391. The reversal of 2878389 is 9838782.

It is not a de Polignac number, because 2878389 - 2⁴ = 2878373 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2876389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2677 + ... + 3594.

It is an arithmetic number, because the mean of its divisors is an integer number (282240).

2^2878389 is an apocalyptic number.

It is an amenable number.

2878389 is a deficient number, since it is larger than the sum of its proper divisors (1637451).

2878389 is a wasteful number, since it uses less digits than its factorization.

2878389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6297 (or 6291 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 2878389 is about 1696.5815630261. The cubic root of 2878389 is about 142.2491987357.

The spelling of 2878389 in words is "two million, eight hundred seventy-eight thousand, three hundred eighty-nine".