278467 has 6 divisors (see below), whose sum is σ = 323988. Its totient is φ = 238644.

The previous prime is 278459. The next prime is 278479. The reversal of 278467 is 764872.

It is not a de Polignac number, because 278467 - 2³ = 278459 is a prime.

278467 is a lucky number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (278437) 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 5 ways as a sum of consecutive naturals, for example, 2793 + ... + 2890.

It is an arithmetic number, because the mean of its divisors is an integer number (53998).

2²⁷⁸⁴⁶⁷ is an apocalyptic number.

278467 is a deficient number, since it is larger than the sum of its proper divisors (45521).

278467 is an equidigital number, since it uses as much as digits as its factorization.

278467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5697 (or 5690 counting only the distinct ones).

The product of its digits is 18816, while the sum is 34.

The square root of 278467 is about 527.6997252226. The cubic root of 278467 is about 65.3017137244.

The spelling of 278467 in words is "two hundred seventy-eight thousand, four hundred sixty-seven".