381982 has 16 divisors (see below), whose sum is σ = 607104. Its totient is φ = 180000.

The previous prime is 381977. The next prime is 381989. The reversal of 381982 is 289183.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381989) by changing a digit.

381982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3732 + ... + 3832.

It is an arithmetic number, because the mean of its divisors is an integer number (37944).

2³⁸¹⁹⁸² is an apocalyptic number.

381982 is a deficient number, since it is larger than the sum of its proper divisors (225122).

381982 is a wasteful number, since it uses less digits than its factorization.

381982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195.

The product of its digits is 3456, while the sum is 31.

The square root of 381982 is about 618.0469237849. The cubic root of 381982 is about 72.5572753902.

The spelling of 381982 in words is "three hundred eighty-one thousand, nine hundred eighty-two".