394381 has 8 divisors (see below), whose sum is σ = 443520. Its totient is φ = 347952.

The previous prime is 394369. The next prime is 394393. The reversal of 394381 is 183493.

It is an interprime number because it is at equal distance from previous prime (394369) and next prime (394393).

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

It is a cyclic number.

It is not a de Polignac number, because 394381 - 2¹¹ = 392333 is a prime.

It is a super-2 number, since 2×394381² = 311072746322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361 + ... + 958.

It is an arithmetic number, because the mean of its divisors is an integer number (55440).

2³⁹⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

394381 is a deficient number, since it is larger than the sum of its proper divisors (49139).

394381 is a wasteful number, since it uses less digits than its factorization.

394381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355.

The product of its digits is 2592, while the sum is 28.

The square root of 394381 is about 627.9976114604. The cubic root of 394381 is about 73.3339921888. Note that the first 3 decimals are identical.

The spelling of 394381 in words is "three hundred ninety-four thousand, three hundred eighty-one".