381378 has 16 divisors (see below), whose sum is σ = 807840. Its totient is φ = 119616.

The previous prime is 381377. The next prime is 381383. The reversal of 381378 is 873183.

It is not an unprimeable number, because it can be changed into a prime (381371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1768 + ... + 1971.

It is an arithmetic number, because the mean of its divisors is an integer number (50490).

2³⁸¹³⁷⁸ is an apocalyptic number.

381378 is an abundant number, since it is smaller than the sum of its proper divisors (426462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381378 is a wasteful number, since it uses less digits than its factorization.

381378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3761.

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

The square root of 381378 is about 617.5580944332. The cubic root of 381378 is about 72.5190120571.

The spelling of 381378 in words is "three hundred eighty-one thousand, three hundred seventy-eight".