222978 has 16 divisors (see below), whose sum is σ = 509760. Its totient is φ = 63696.

The previous prime is 222977. The next prime is 222979. The reversal of 222978 is 879222.

It is an interprime number because it is at equal distance from previous prime (222977) and next prime (222979).

It is a d-powerful number, because it can be written as 2⁵ + 2¹⁵ + 9⁵ + 2¹⁷ + 7² + 8 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222977) 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, 2613 + ... + 2696.

It is an arithmetic number, because the mean of its divisors is an integer number (31860).

2²²²⁹⁷⁸ is an apocalyptic number.

222978 is an abundant number, since it is smaller than the sum of its proper divisors (286782).

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

222978 is a wasteful number, since it uses less digits than its factorization.

222978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5321.

The product of its digits is 4032, while the sum is 30.

The square root of 222978 is about 472.2054637549. The cubic root of 222978 is about 60.6392756972.

The spelling of 222978 in words is "two hundred twenty-two thousand, nine hundred seventy-eight".