2878689 has 16 divisors (see below), whose sum is σ = 4241664. Its totient is φ = 1722000.

The previous prime is 2878679. The next prime is 2878693. The reversal of 2878689 is 9868782.

It is a happy number.

It is not a de Polignac number, because 2878689 - 2¹⁷ = 2747617 is a prime.

It is a Curzon number.

2878689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2878639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2214 + ... + 3264.

It is an arithmetic number, because the mean of its divisors is an integer number (265104).

2^2878689 is an apocalyptic number.

It is an amenable number.

2878689 is a deficient number, since it is larger than the sum of its proper divisors (1362975).

2878689 is a wasteful number, since it uses less digits than its factorization.

2878689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148.

The product of its digits is 387072, while the sum is 48.

The square root of 2878689 is about 1696.6699738016. The cubic root of 2878689 is about 142.2541405367.

The spelling of 2878689 in words is "two million, eight hundred seventy-eight thousand, six hundred eighty-nine".