278862 has 8 divisors (see below), whose sum is σ = 557736. Its totient is φ = 92952.

The previous prime is 278849. The next prime is 278867. The reversal of 278862 is 268872.

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

278862 is an admirable number.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 278862.

It is not an unprimeable number, because it can be changed into a prime (278867) by changing a digit.

278862 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23233 + ... + 23244.

It is an arithmetic number, because the mean of its divisors is an integer number (69717).

2²⁷⁸⁸⁶² is an apocalyptic number.

278862 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

278862 is a wasteful number, since it uses less digits than its factorization.

278862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46482.

The product of its digits is 10752, while the sum is 33.

The square root of 278862 is about 528.0738584706. The cubic root of 278862 is about 65.3325755384.

It can be divided in two parts, 2788 and 62, that added together give a triangular number (2850 = T₇₅).

The spelling of 278862 in words is "two hundred seventy-eight thousand, eight hundred sixty-two".