278822 has 8 divisors (see below), whose sum is σ = 422400. Its totient is φ = 138024.

The previous prime is 278819. The next prime is 278827. The reversal of 278822 is 228872.

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

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 278822.

It is not an unprimeable number, because it can be changed into a prime (278827) 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, 422 + ... + 857.

It is an arithmetic number, because the mean of its divisors is an integer number (52800).

2²⁷⁸⁸²² is an apocalyptic number.

278822 is a deficient number, since it is larger than the sum of its proper divisors (143578).

278822 is a wasteful number, since it uses less digits than its factorization.

278822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390.

The product of its digits is 3584, while the sum is 29.

The square root of 278822 is about 528.0359836223. The cubic root of 278822 is about 65.3294516181.

The spelling of 278822 in words is "two hundred seventy-eight thousand, eight hundred twenty-two".