6878815 has 8 divisors (see below), whose sum is σ = 8273088. Its totient is φ = 5490720.

The previous prime is 6878813. The next prime is 6878821. The reversal of 6878815 is 5188786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6878815 - 2¹ = 6878813 is a prime.

It is a Duffinian number.

6878815 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6878813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1434 + ... + 3976.

It is an arithmetic number, because the mean of its divisors is an integer number (1034136).

Almost surely, 2^6878815 is an apocalyptic number.

6878815 is a deficient number, since it is larger than the sum of its proper divisors (1394273).

6878815 is a wasteful number, since it uses less digits than its factorization.

6878815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089.

The product of its digits is 107520, while the sum is 43.

The square root of 6878815 is about 2622.7495114860. The cubic root of 6878815 is about 190.1827880826.

The spelling of 6878815 in words is "six million, eight hundred seventy-eight thousand, eight hundred fifteen".