278047 has 16 divisors (see below), whose sum is σ = 364032. Its totient is φ = 205920.

The previous prime is 278041. The next prime is 278051. The reversal of 278047 is 740872.

It is not a de Polignac number, because 278047 - 2⁷ = 277919 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1693 + ... + 1849.

It is an arithmetic number, because the mean of its divisors is an integer number (22752).

2²⁷⁸⁰⁴⁷ is an apocalyptic number.

278047 is a deficient number, since it is larger than the sum of its proper divisors (85985).

278047 is a wasteful number, since it uses less digits than its factorization.

278047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 278047 is about 527.3016214654. The cubic root of 278047 is about 65.2688666004.

Subtracting from 278047 its product of nonzero digits (3136), we obtain a triangular number (274911 = T₇₄₁).

The spelling of 278047 in words is "two hundred seventy-eight thousand, forty-seven".