222878 has 4 divisors (see below), whose sum is σ = 334320. Its totient is φ = 111438.

The previous prime is 222877. The next prime is 222883. The reversal of 222878 is 878222.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 222878.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55718 + ... + 55721.

It is an arithmetic number, because the mean of its divisors is an integer number (83580).

2²²²⁸⁷⁸ is an apocalyptic number.

222878 is a deficient number, since it is larger than the sum of its proper divisors (111442).

222878 is a wasteful number, since it uses less digits than its factorization.

222878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111441.

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

The square root of 222878 is about 472.0995657698. The cubic root of 222878 is about 60.6302092806.

The spelling of 222878 in words is "two hundred twenty-two thousand, eight hundred seventy-eight".