381982886 has 4 divisors (see below), whose sum is σ = 572974332. Its totient is φ = 190991442.

The previous prime is 381982883. The next prime is 381982891. The reversal of 381982886 is 688289183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 688289183 = 17 ⋅40487599.

It is a super-3 number, since 3×381982886³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381982883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95495720 + ... + 95495723.

It is an arithmetic number, because the mean of its divisors is an integer number (143243583).

Almost surely, 2^381982886 is an apocalyptic number.

381982886 is a deficient number, since it is larger than the sum of its proper divisors (190991446).

381982886 is a wasteful number, since it uses less digits than its factorization.

381982886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190991445.

The product of its digits is 1327104, while the sum is 53.

The square root of 381982886 is about 19544.3824665810. The cubic root of 381982886 is about 725.5733148860.

The spelling of 381982886 in words is "three hundred eighty-one million, nine hundred eighty-two thousand, eight hundred eighty-six".