381286 has 8 divisors (see below), whose sum is σ = 574704. Its totient is φ = 189720.

The previous prime is 381253. The next prime is 381287. The reversal of 381286 is 682183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381287) 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, 316 + ... + 928.

It is an arithmetic number, because the mean of its divisors is an integer number (71838).

2³⁸¹²⁸⁶ is an apocalyptic number.

381286 is a deficient number, since it is larger than the sum of its proper divisors (193418).

381286 is a wasteful number, since it uses less digits than its factorization.

381286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926.

The product of its digits is 2304, while the sum is 28.

The square root of 381286 is about 617.4836030212. The cubic root of 381286 is about 72.5131803227.

The spelling of 381286 in words is "three hundred eighty-one thousand, two hundred eighty-six".