278893 has 8 divisors (see below), whose sum is σ = 295200. Its totient is φ = 263088.

The previous prime is 278891. The next prime is 278903. The reversal of 278893 is 398872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 278893 - 2¹ = 278891 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 7² + 8² + 8⁶ + 9 + 3⁵ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278891) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1630 + ... + 1792.

It is an arithmetic number, because the mean of its divisors is an integer number (36900).

2²⁷⁸⁸⁹³ is an apocalyptic number.

It is an amenable number.

278893 is a deficient number, since it is larger than the sum of its proper divisors (16307).

278893 is a wasteful number, since it uses less digits than its factorization.

278893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251.

The product of its digits is 24192, while the sum is 37.

The square root of 278893 is about 528.1032096096. The cubic root of 278893 is about 65.3349963712.

The spelling of 278893 in words is "two hundred seventy-eight thousand, eight hundred ninety-three".