278794 has 4 divisors (see below), whose sum is σ = 418194. Its totient is φ = 139396.

The previous prime is 278767. The next prime is 278801. The reversal of 278794 is 497872.

It is a happy number.

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., 263169 + 15625 = 513^2 + 125^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69697 + ... + 69700.

2²⁷⁸⁷⁹⁴ is an apocalyptic number.

278794 is a deficient number, since it is larger than the sum of its proper divisors (139400).

278794 is a wasteful number, since it uses less digits than its factorization.

278794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139399.

The product of its digits is 28224, while the sum is 37.

The square root of 278794 is about 528.0094696121. The cubic root of 278794 is about 65.3272646962.

The spelling of 278794 in words is "two hundred seventy-eight thousand, seven hundred ninety-four".