381304 has 32 divisors (see below), whose sum is σ = 892800. Its totient is φ = 148320.

The previous prime is 381301. The next prime is 381319. The reversal of 381304 is 403183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 925.

It is an arithmetic number, because the mean of its divisors is an integer number (27900).

2³⁸¹³⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (446400).

381304 is an abundant number, since it is smaller than the sum of its proper divisors (511496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381304 is a wasteful number, since it uses less digits than its factorization.

381304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 639 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 381304 is about 617.4981781350. The cubic root of 381304 is about 72.5143213880.

Adding to 381304 its reverse (403183), we get a palindrome (784487).

The spelling of 381304 in words is "three hundred eighty-one thousand, three hundred four".