6878889 has 6 divisors (see below), whose sum is σ = 9936186. Its totient is φ = 4585920.

The previous prime is 6878867. The next prime is 6878891. The reversal of 6878889 is 9888786.

It can be written as a sum of positive squares in only one way, i.e., 5253264 + 1625625 = 2292^2 + 1275^2 .

It is not a de Polignac number, because 6878889 - 2¹³ = 6870697 is a prime.

It is a super-2 number, since 2×6878889² = 94638227748642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6878849) 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 5 ways as a sum of consecutive naturals, for example, 382152 + ... + 382169.

It is an arithmetic number, because the mean of its divisors is an integer number (1656031).

Almost surely, 2^6878889 is an apocalyptic number.

It is an amenable number.

6878889 is a deficient number, since it is larger than the sum of its proper divisors (3057297).

6878889 is a wasteful number, since it uses less digits than its factorization.

6878889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764327 (or 764324 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 54.

The square root of 6878889 is about 2622.7636187808. The cubic root of 6878889 is about 190.1834700545.

The spelling of 6878889 in words is "six million, eight hundred seventy-eight thousand, eight hundred eighty-nine".