384381 has 6 divisors (see below), whose sum is σ = 555230. Its totient is φ = 256248.

The previous prime is 384367. The next prime is 384383. The reversal of 384381 is 183483.

It can be written as a sum of positive squares in only one way, i.e., 285156 + 99225 = 534^2 + 315^2 .

It is not a de Polignac number, because 384381 - 2⁶ = 384317 is a prime.

It is a super-2 number, since 2×384381² = 295497506322, 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 (384383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21346 + ... + 21363.

2³⁸⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

384381 is a deficient number, since it is larger than the sum of its proper divisors (170849).

384381 is a wasteful number, since it uses less digits than its factorization.

384381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42715 (or 42712 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 384381 is about 619.9846772300. The cubic root of 384381 is about 72.7088547584.

The spelling of 384381 in words is "three hundred eighty-four thousand, three hundred eighty-one".