278089 has 4 divisors (see below), whose sum is σ = 317824. Its totient is φ = 238356.

The previous prime is 278087. The next prime is 278111. The reversal of 278089 is 980872.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 278089 - 2¹ = 278087 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 (278087) 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, 19857 + ... + 19870.

It is an arithmetic number, because the mean of its divisors is an integer number (79456).

2²⁷⁸⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

278089 is a deficient number, since it is larger than the sum of its proper divisors (39735).

278089 is an equidigital number, since it uses as much as digits as its factorization.

278089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39734.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 278089 is about 527.3414453653. The cubic root of 278089 is about 65.2721528007.

The spelling of 278089 in words is "two hundred seventy-eight thousand, eighty-nine".