378381 has 4 divisors (see below), whose sum is σ = 504512. Its totient is φ = 252252.

The previous prime is 378379. The next prime is 378401. The reversal of 378381 is 183873.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 183873 = 3 ⋅61291.

It is not a de Polignac number, because 378381 - 2¹ = 378379 is a prime.

It is a super-2 number, since 2×378381² = 286344362322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

378381 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378361) 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, 63061 + ... + 63066.

It is an arithmetic number, because the mean of its divisors is an integer number (126128).

2³⁷⁸³⁸¹ is an apocalyptic number.

It is an amenable number.

378381 is a deficient number, since it is larger than the sum of its proper divisors (126131).

378381 is a wasteful number, since it uses less digits than its factorization.

378381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126130.

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

The square root of 378381 is about 615.1268161932. The cubic root of 378381 is about 72.3285524718.

The spelling of 378381 in words is "three hundred seventy-eight thousand, three hundred eighty-one".