381912 has 16 divisors (see below), whose sum is σ = 954840. Its totient is φ = 127296.

The previous prime is 381911. The next prime is 381917. The reversal of 381912 is 219183.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 15913 = 381912 / (3 + 8 + 1 + 9 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381911) by changing a digit.

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, 7933 + ... + 7980.

2³⁸¹⁹¹² is an apocalyptic number.

It is an amenable number.

381912 is an abundant number, since it is smaller than the sum of its proper divisors (572928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381912 is a wasteful number, since it uses less digits than its factorization.

381912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15922 (or 15918 counting only the distinct ones).

The product of its digits is 432, while the sum is 24.

The square root of 381912 is about 617.9902911859. The cubic root of 381912 is about 72.5528429654.

The spelling of 381912 in words is "three hundred eighty-one thousand, nine hundred twelve".