381544 has 16 divisors (see below), whose sum is σ = 735300. Its totient is φ = 185472.

The previous prime is 381541. The next prime is 381559. The reversal of 381544 is 445183.

It can be written as a sum of positive squares in 2 ways, for example, as 324900 + 56644 = 570^2 + 238^2 .

It is not an unprimeable number, because it can be changed into a prime (381541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 349 + ... + 940.

2³⁸¹⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

381544 is a deficient number, since it is larger than the sum of its proper divisors (353756).

381544 is a wasteful number, since it uses less digits than its factorization.

381544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332 (or 1328 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 381544 is about 617.6924801226. The cubic root of 381544 is about 72.5295321622.

The spelling of 381544 in words is "three hundred eighty-one thousand, five hundred forty-four".