6381886 has 8 divisors (see below), whose sum is σ = 10940400. Its totient is φ = 2735088.

The previous prime is 6381863. The next prime is 6381899. The reversal of 6381886 is 6881836.

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

It is a super-3 number, since 3×6381886³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227911 + ... + 227938.

It is an arithmetic number, because the mean of its divisors is an integer number (1367550).

Almost surely, 2^6381886 is an apocalyptic number.

6381886 is a deficient number, since it is larger than the sum of its proper divisors (4558514).

6381886 is a wasteful number, since it uses less digits than its factorization.

6381886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455858.

The product of its digits is 55296, while the sum is 40.

The square root of 6381886 is about 2526.2394977515. The cubic root of 6381886 is about 185.4882258712.

The spelling of 6381886 in words is "six million, three hundred eighty-one thousand, eight hundred eighty-six".