378985 has 4 divisors (see below), whose sum is σ = 454788. Its totient is φ = 303184.

The previous prime is 378977. The next prime is 378997. The reversal of 378985 is 589873.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 166464 = 461^2 + 408^2 .

It is a cyclic number.

It is not a de Polignac number, because 378985 - 2³ = 378977 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37894 + ... + 37903.

It is an arithmetic number, because the mean of its divisors is an integer number (113697).

2³⁷⁸⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

378985 is a deficient number, since it is larger than the sum of its proper divisors (75803).

378985 is an equidigital number, since it uses as much as digits as its factorization.

378985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75802.

The product of its digits is 60480, while the sum is 40.

The square root of 378985 is about 615.6175760974. The cubic root of 378985 is about 72.3670174238.

The spelling of 378985 in words is "three hundred seventy-eight thousand, nine hundred eighty-five".