378866 has 4 divisors (see below), whose sum is σ = 568302. Its totient is φ = 189432.

The previous prime is 378823. The next prime is 378869. The reversal of 378866 is 668873.

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., 235225 + 143641 = 485^2 + 379^2 .

It is a d-powerful number, because it can be written as 3⁷ + 7⁵ + 8³ + 8⁵ + 6⁶ + 6⁷ .

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94715 + ... + 94718.

2³⁷⁸⁸⁶⁶ is an apocalyptic number.

378866 is a deficient number, since it is larger than the sum of its proper divisors (189436).

378866 is a wasteful number, since it uses less digits than its factorization.

378866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189435.

The product of its digits is 48384, while the sum is 38.

The square root of 378866 is about 615.5209175974. The cubic root of 378866 is about 72.3594422985.

The spelling of 378866 in words is "three hundred seventy-eight thousand, eight hundred sixty-six".