381387 has 8 divisors (see below), whose sum is σ = 535360. Its totient is φ = 240840.

The previous prime is 381383. The next prime is 381389. The reversal of 381387 is 783183.

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

It is not a de Polignac number, because 381387 - 2² = 381383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3289 + ... + 3402.

It is an arithmetic number, because the mean of its divisors is an integer number (66920).

2³⁸¹³⁸⁷ is an apocalyptic number.

381387 is a deficient number, since it is larger than the sum of its proper divisors (153973).

381387 is a wasteful number, since it uses less digits than its factorization.

381387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6713.

The product of its digits is 4032, while the sum is 30.

The square root of 381387 is about 617.5653811541. The cubic root of 381387 is about 72.5195825025.

The spelling of 381387 in words is "three hundred eighty-one thousand, three hundred eighty-seven".