2878399 has 4 divisors (see below), whose sum is σ = 2907000. Its totient is φ = 2849800.

The previous prime is 2878397. The next prime is 2878409. The reversal of 2878399 is 9938782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2878399 - 2¹ = 2878397 is a prime.

It is a Duffinian number.

2878399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2878391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14149 + ... + 14350.

It is an arithmetic number, because the mean of its divisors is an integer number (726750).

2^2878399 is an apocalyptic number.

2878399 is a deficient number, since it is larger than the sum of its proper divisors (28601).

2878399 is a wasteful number, since it uses less digits than its factorization.

2878399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28600.

The product of its digits is 217728, while the sum is 46.

The square root of 2878399 is about 1696.5845101262. The cubic root of 2878399 is about 142.2493634679.

It can be divided in two parts, 28783 and 99, that added together give a palindrome (28882).

The spelling of 2878399 in words is "two million, eight hundred seventy-eight thousand, three hundred ninety-nine".