278404 has 24 divisors (see below), whose sum is σ = 569408. Its totient is φ = 116640.

The previous prime is 278393. The next prime is 278413. The reversal of 278404 is 404872.

278404 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1627 + ... + 1789.

2²⁷⁸⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

278404 is an abundant number, since it is smaller than the sum of its proper divisors (291004).

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

278404 is a wasteful number, since it uses less digits than its factorization.

278404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 278404 is about 527.6400288075. The cubic root of 278404 is about 65.2967887623.

The spelling of 278404 in words is "two hundred seventy-eight thousand, four hundred four".