6378855 has 32 divisors (see below), whose sum is σ = 11827200. Its totient is φ = 2875392.

The previous prime is 6378847. The next prime is 6378863. The reversal of 6378855 is 5588736.

It is an interprime number because it is at equal distance from previous prime (6378847) and next prime (6378863).

It is not a de Polignac number, because 6378855 - 2³ = 6378847 is a prime.

It is a super-2 number, since 2×6378855² = 81379582222050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7911 + ... + 8679.

It is an arithmetic number, because the mean of its divisors is an integer number (369600).

Almost surely, 2^6378855 is an apocalyptic number.

6378855 is a deficient number, since it is larger than the sum of its proper divisors (5448345).

6378855 is a wasteful number, since it uses less digits than its factorization.

6378855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863.

The product of its digits is 201600, while the sum is 42.

The square root of 6378855 is about 2525.6395229724. The cubic root of 6378855 is about 185.4588560871.

The spelling of 6378855 in words is "six million, three hundred seventy-eight thousand, eight hundred fifty-five".