381111982 has 16 divisors (see below), whose sum is σ = 575948880. Its totient is φ = 189134848.

The previous prime is 381111979. The next prime is 381111989. The reversal of 381111982 is 289111183.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381111989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161769 + ... + 164107.

It is an arithmetic number, because the mean of its divisors is an integer number (35996805).

Almost surely, 2^381111982 is an apocalyptic number.

381111982 is a deficient number, since it is larger than the sum of its proper divisors (194836898).

381111982 is a wasteful number, since it uses less digits than its factorization.

381111982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2915.

The product of its digits is 3456, while the sum is 34.

The square root of 381111982 is about 19522.0895910248. The cubic root of 381111982 is about 725.0214703115.

The spelling of 381111982 in words is "three hundred eighty-one million, one hundred eleven thousand, nine hundred eighty-two".