378891 has 8 divisors (see below), whose sum is σ = 561360. Its totient is φ = 252576.

The previous prime is 378883. The next prime is 378893. The reversal of 378891 is 198873.

It is not a de Polignac number, because 378891 - 2³ = 378883 is a prime.

378891 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 378891.

It is not an unprimeable number, because it can be changed into a prime (378893) 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, 6990 + ... + 7043.

It is an arithmetic number, because the mean of its divisors is an integer number (70170).

2³⁷⁸⁸⁹¹ is an apocalyptic number.

378891 is a deficient number, since it is larger than the sum of its proper divisors (182469).

378891 is a wasteful number, since it uses less digits than its factorization.

378891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14042 (or 14036 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 378891 is about 615.5412252644. The cubic root of 378891 is about 72.3610338430.

The spelling of 378891 in words is "three hundred seventy-eight thousand, eight hundred ninety-one".