381398 has 4 divisors (see below), whose sum is σ = 572100. Its totient is φ = 190698.

The previous prime is 381389. The next prime is 381401. The reversal of 381398 is 893183.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381398.

It is an unprimeable number.

381398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 95348 + ... + 95351.

It is an arithmetic number, because the mean of its divisors is an integer number (143025).

2³⁸¹³⁹⁸ is an apocalyptic number.

381398 is a deficient number, since it is larger than the sum of its proper divisors (190702).

381398 is a wasteful number, since it uses less digits than its factorization.

381398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190701.

The product of its digits is 5184, while the sum is 32.

The square root of 381398 is about 617.5742870295. The cubic root of 381398 is about 72.5202797014.

The spelling of 381398 in words is "three hundred eighty-one thousand, three hundred ninety-eight".