84381866 has 8 divisors (see below), whose sum is σ = 126816384. Its totient is φ = 42109740.

The previous prime is 84381839. The next prime is 84381889. The reversal of 84381866 is 66818348.

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

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, 39290 + ... + 41381.

It is an arithmetic number, because the mean of its divisors is an integer number (15852048).

Almost surely, 2^84381866 is an apocalyptic number.

84381866 is a deficient number, since it is larger than the sum of its proper divisors (42434518).

84381866 is a wasteful number, since it uses less digits than its factorization.

84381866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81196.

The product of its digits is 221184, while the sum is 44.

The square root of 84381866 is about 9185.9602655357. The cubic root of 84381866 is about 438.6145574793.

The spelling of 84381866 in words is "eighty-four million, three hundred eighty-one thousand, eight hundred sixty-six".