381580 has 12 divisors (see below), whose sum is σ = 801360. Its totient is φ = 152624.

The previous prime is 381569. The next prime is 381607. The reversal of 381580 is 85183.

It is an unprimeable number.

381580 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 3 ways as a sum of consecutive naturals, for example, 9520 + ... + 9559.

It is an arithmetic number, because the mean of its divisors is an integer number (66780).

2³⁸¹⁵⁸⁰ is an apocalyptic number.

It is an amenable number.

381580 is an abundant number, since it is smaller than the sum of its proper divisors (419780).

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

381580 is a wasteful number, since it uses less digits than its factorization.

381580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19088 (or 19086 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 381580 is about 617.7216201494. The cubic root of 381580 is about 72.5318132281.

It can be divided in two parts, 381 and 580, that added together give a square (961 = 31²).

The spelling of 381580 in words is "three hundred eighty-one thousand, five hundred eighty".