381908 has 12 divisors (see below), whose sum is σ = 672672. Its totient is φ = 189720.

The previous prime is 381859. The next prime is 381911. The reversal of 381908 is 809183.

It is a happy number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381908.

It is an unprimeable number.

381908 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 1073 + ... + 1383.

It is an arithmetic number, because the mean of its divisors is an integer number (56056).

2³⁸¹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

381908 is a deficient number, since it is larger than the sum of its proper divisors (290764).

381908 is a wasteful number, since it uses less digits than its factorization.

381908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 381908 is about 617.9870548806. The cubic root of 381908 is about 72.5525896676.

The spelling of 381908 in words is "three hundred eighty-one thousand, nine hundred eight".