278598 has 16 divisors (see below), whose sum is σ = 567360. Its totient is φ = 91176.

The previous prime is 278591. The next prime is 278609. The reversal of 278598 is 895872.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278591) by changing a digit.

278598 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40 + ... + 747.

It is an arithmetic number, because the mean of its divisors is an integer number (35460).

2²⁷⁸⁵⁹⁸ is an apocalyptic number.

278598 is an abundant number, since it is smaller than the sum of its proper divisors (288762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278598 is a wasteful number, since it uses less digits than its factorization.

278598 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851.

The product of its digits is 40320, while the sum is 39.

The square root of 278598 is about 527.8238342478. The cubic root of 278598 is about 65.3119521409.

The spelling of 278598 in words is "two hundred seventy-eight thousand, five hundred ninety-eight".