1002222188 has 36 divisors (see below), whose sum is σ = 1990046016. Its totient is φ = 440853600.

The previous prime is 1002222121. The next prime is 1002222229. The reversal of 1002222188 is 8812222001.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18395 + ... + 48402.

It is an arithmetic number, because the mean of its divisors is an integer number (55279056).

Almost surely, 2^1002222188 is an apocalyptic number.

It is an amenable number.

1002222188 is a deficient number, since it is larger than the sum of its proper divisors (987823828).

1002222188 is a wasteful number, since it uses less digits than its factorization.

1002222188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66854 (or 66841 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 1002222188 is about 31657.8929810561. The cubic root of 1002222188 is about 1000.7401813298.

Adding to 1002222188 its reverse (8812222001), we get a palindrome (9814444189).

The spelling of 1002222188 in words is "one billion, two million, two hundred twenty-two thousand, one hundred eighty-eight".