381330 has 48 divisors (see below), whose sum is σ = 1048320. Its totient is φ = 95904.

The previous prime is 381323. The next prime is 381343. The reversal of 381330 is 33183.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

381330 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1599 + ... + 1821.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2³⁸¹³³⁰ is an apocalyptic number.

381330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 381330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524160).

381330 is an abundant number, since it is smaller than the sum of its proper divisors (666990).

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

381330 is a wasteful number, since it uses less digits than its factorization.

381330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 381330 is about 617.5192304698. The cubic root of 381330 is about 72.5159695301.

The spelling of 381330 in words is "three hundred eighty-one thousand, three hundred thirty".