6381998 has 16 divisors (see below), whose sum is σ = 10973184. Its totient is φ = 2727000.

The previous prime is 6381979. The next prime is 6382007. The reversal of 6381998 is 8991836.

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 7 ways as a sum of consecutive naturals, for example, 8123 + ... + 8873.

It is an arithmetic number, because the mean of its divisors is an integer number (685824).

Almost surely, 2^6381998 is an apocalyptic number.

6381998 is a deficient number, since it is larger than the sum of its proper divisors (4591186).

6381998 is a wasteful number, since it uses less digits than its factorization.

6381998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367.

The product of its digits is 93312, while the sum is 44.

The square root of 6381998 is about 2526.2616649904. The cubic root of 6381998 is about 185.4893109506.

The spelling of 6381998 in words is "six million, three hundred eighty-one thousand, nine hundred ninety-eight".