278359 has 4 divisors (see below), whose sum is σ = 279720. Its totient is φ = 277000.

The previous prime is 278353. The next prime is 278363. The reversal of 278359 is 953872.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 278359 - 2⁹ = 277847 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 6.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278353) 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, 304 + ... + 805.

It is an arithmetic number, because the mean of its divisors is an integer number (69930).

2²⁷⁸³⁵⁹ is an apocalyptic number.

278359 is a deficient number, since it is larger than the sum of its proper divisors (1361).

278359 is a wasteful number, since it uses less digits than its factorization.

278359 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360.

The product of its digits is 15120, while the sum is 34.

The square root of 278359 is about 527.5973843756. The cubic root of 278359 is about 65.2932704773.

The spelling of 278359 in words is "two hundred seventy-eight thousand, three hundred fifty-nine".