381447 has 12 divisors (see below), whose sum is σ = 601224. Its totient is φ = 231120.

The previous prime is 381443. The next prime is 381461. The reversal of 381447 is 744183.

It is not a de Polignac number, because 381447 - 2² = 381443 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 381447.

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 381447.

It is not an unprimeable number, because it can be changed into a prime (381443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1828 + ... + 2025.

It is an arithmetic number, because the mean of its divisors is an integer number (50102).

2³⁸¹⁴⁴⁷ is an apocalyptic number.

381447 is a deficient number, since it is larger than the sum of its proper divisors (219777).

381447 is a wasteful number, since it uses less digits than its factorization.

381447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870 (or 3867 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 381447 is about 617.6139570962. The cubic root of 381447 is about 72.5233852425.

It can be divided in two parts, 381 and 447, that added together give a palindrome (828).

The spelling of 381447 in words is "three hundred eighty-one thousand, four hundred forty-seven".