278223 has 8 divisors (see below), whose sum is σ = 404736. Its totient is φ = 168600.

The previous prime is 278219. The next prime is 278227. The reversal of 278223 is 322872.

It is an interprime number because it is at equal distance from previous prime (278219) and next prime (278227).

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

It is not a de Polignac number, because 278223 - 2² = 278219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 278193 and 278202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278227) 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, 4183 + ... + 4248.

It is an arithmetic number, because the mean of its divisors is an integer number (50592).

2²⁷⁸²²³ is an apocalyptic number.

278223 is a deficient number, since it is larger than the sum of its proper divisors (126513).

278223 is a wasteful number, since it uses less digits than its factorization.

278223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8445.

The product of its digits is 1344, while the sum is 24.

The square root of 278223 is about 527.4684824708. The cubic root of 278223 is about 65.2826351331.

The spelling of 278223 in words is "two hundred seventy-eight thousand, two hundred twenty-three".