378986 has 4 divisors (see below), whose sum is σ = 568482. Its totient is φ = 189492.

The previous prime is 378977. The next prime is 378997. The reversal of 378986 is 689873.

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

It can be written as a sum of positive squares in only one way, i.e., 323761 + 55225 = 569^2 + 235^2 .

It is an unprimeable number.

378986 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94745 + ... + 94748.

2³⁷⁸⁹⁸⁶ is an apocalyptic number.

378986 is a deficient number, since it is larger than the sum of its proper divisors (189496).

378986 is a wasteful number, since it uses less digits than its factorization.

378986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189495.

The product of its digits is 72576, while the sum is 41.

The square root of 378986 is about 615.6183882894. The cubic root of 378986 is about 72.3670810736.

The spelling of 378986 in words is "three hundred seventy-eight thousand, nine hundred eighty-six".