222222788 has 24 divisors (see below), whose sum is σ = 399469560. Its totient is φ = 108103680.

The previous prime is 222222779. The next prime is 222222797. The reversal of 222222788 is 887222222.

It is an interprime number because it is at equal distance from previous prime (222222779) and next prime (222222797).

It can be written as a sum of positive squares in 4 ways, for example, as 72454144 + 149768644 = 8512^2 + 12238^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65420 + ... + 68732.

It is an arithmetic number, because the mean of its divisors is an integer number (16644565).

Almost surely, 2^222222788 is an apocalyptic number.

It is an amenable number.

222222788 is a deficient number, since it is larger than the sum of its proper divisors (177246772).

222222788 is a wasteful number, since it uses less digits than its factorization.

222222788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3767 (or 3765 counting only the distinct ones).

The product of its digits is 28672, while the sum is 35.

The square root of 222222788 is about 14907.1388267501. The cubic root of 222222788 is about 605.7073783202.

The spelling of 222222788 in words is "two hundred twenty-two million, two hundred twenty-two thousand, seven hundred eighty-eight".