278394 has 8 divisors (see below), whose sum is σ = 556800. Its totient is φ = 92796.

The previous prime is 278393. The next prime is 278413. The reversal of 278394 is 493872.

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

278394 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (278393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23194 + ... + 23205.

It is an arithmetic number, because the mean of its divisors is an integer number (69600).

2²⁷⁸³⁹⁴ is an apocalyptic number.

278394 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278394 is a wasteful number, since it uses less digits than its factorization.

278394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46404.

The product of its digits is 12096, while the sum is 33.

The square root of 278394 is about 527.6305525650. The cubic root of 278394 is about 65.2960069539.

The spelling of 278394 in words is "two hundred seventy-eight thousand, three hundred ninety-four".