381380 has 12 divisors (see below), whose sum is σ = 800940. Its totient is φ = 152544.

The previous prime is 381377. The next prime is 381383. The reversal of 381380 is 83183.

It is an interprime number because it is at equal distance from previous prime (381377) and next prime (381383).

It can be written as a sum of positive squares in 2 ways, for example, as 293764 + 87616 = 542^2 + 296^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381383) 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, 9515 + ... + 9554.

It is an arithmetic number, because the mean of its divisors is an integer number (66745).

2³⁸¹³⁸⁰ is an apocalyptic number.

It is an amenable number.

381380 is an abundant number, since it is smaller than the sum of its proper divisors (419560).

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

381380 is a wasteful number, since it uses less digits than its factorization.

381380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19078 (or 19076 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 381380 is about 617.5597137120. The cubic root of 381380 is about 72.5191388236.

The spelling of 381380 in words is "three hundred eighty-one thousand, three hundred eighty".