278441 has 4 divisors (see below), whose sum is σ = 279552. Its totient is φ = 277332.

The previous prime is 278437. The next prime is 278459. The reversal of 278441 is 144872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 278441 - 2² = 278437 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 15.

It is a nialpdrome in base 13.

It is a zygodrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 278441.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278441.

It is not an unprimeable number, because it can be changed into a prime (278491) 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 3 ways as a sum of consecutive naturals, for example, 20 + ... + 746.

It is an arithmetic number, because the mean of its divisors is an integer number (69888).

2²⁷⁸⁴⁴¹ is an apocalyptic number.

It is an amenable number.

278441 is a deficient number, since it is larger than the sum of its proper divisors (1111).

278441 is an equidigital number, since it uses as much as digits as its factorization.

278441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110.

The product of its digits is 1792, while the sum is 26.

The square root of 278441 is about 527.6750894253. The cubic root of 278441 is about 65.2996812903.

The spelling of 278441 in words is "two hundred seventy-eight thousand, four hundred forty-one".