381280 has 24 divisors (see below), whose sum is σ = 901152. Its totient is φ = 152448.

The previous prime is 381253. The next prime is 381287. The reversal of 381280 is 82183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381287) by changing a digit.

381280 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, 1032 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (37548).

2³⁸¹²⁸⁰ is an apocalyptic number.

It is an amenable number.

381280 is an abundant number, since it is smaller than the sum of its proper divisors (519872).

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

381280 is a wasteful number, since it uses less digits than its factorization.

381280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 381280 is about 617.4787445734. The cubic root of 381280 is about 72.5127999596.

The spelling of 381280 in words is "three hundred eighty-one thousand, two hundred eighty".