381442 has 8 divisors (see below), whose sum is σ = 575100. Its totient is φ = 189744.

The previous prime is 381439. The next prime is 381443. The reversal of 381442 is 244183.

It can be written as a sum of positive squares in 2 ways, for example, as 303601 + 77841 = 551^2 + 279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184 + ... + 892.

2³⁸¹⁴⁴² is an apocalyptic number.

381442 is a deficient number, since it is larger than the sum of its proper divisors (193658).

381442 is a wasteful number, since it uses less digits than its factorization.

381442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its digits is 768, while the sum is 22.

The square root of 381442 is about 617.6099092469. The cubic root of 381442 is about 72.5230683628.

The spelling of 381442 in words is "three hundred eighty-one thousand, four hundred forty-two".