381404 has 12 divisors (see below), whose sum is σ = 675024. Its totient is φ = 188544.

The previous prime is 381401. The next prime is 381413. The reversal of 381404 is 404183.

It is a super-2 number, since 2×381404² = 290938022432, which contains 22 as substring.

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 381404.

It is not an unprimeable number, because it can be changed into a prime (381401) 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, 104 + ... + 879.

It is an arithmetic number, because the mean of its divisors is an integer number (56252).

2³⁸¹⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

381404 is a deficient number, since it is larger than the sum of its proper divisors (293620).

381404 is a wasteful number, since it uses less digits than its factorization.

381404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1084 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 381404 is about 617.5791447256. The cubic root of 381404 is about 72.5206599860.

Adding to 381404 its reverse (404183), we get a palindrome (785587).

The spelling of 381404 in words is "three hundred eighty-one thousand, four hundred four".