378861 has 8 divisors (see below), whose sum is σ = 577344. Its totient is φ = 216480.

The previous prime is 378823. The next prime is 378869. The reversal of 378861 is 168873.

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

It is not a de Polignac number, because 378861 - 2⁷ = 378733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (378869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9000 + ... + 9041.

It is an arithmetic number, because the mean of its divisors is an integer number (72168).

2³⁷⁸⁸⁶¹ is an apocalyptic number.

It is an amenable number.

378861 is a deficient number, since it is larger than the sum of its proper divisors (198483).

378861 is a wasteful number, since it uses less digits than its factorization.

378861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18051.

The product of its digits is 8064, while the sum is 33.

The square root of 378861 is about 615.5168559837. The cubic root of 378861 is about 72.3591239813.

The spelling of 378861 in words is "three hundred seventy-eight thousand, eight hundred sixty-one".