1222810660 has 24 divisors (see below), whose sum is σ = 2582097336. Its totient is φ = 486420480.

The previous prime is 1222810657. The next prime is 1222810733. The reversal of 1222810660 is 660182221.

It can be written as a sum of positive squares in 4 ways, for example, as 46457856 + 1176352804 = 6816^2 + 34298^2 .

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, 165277 + ... + 172516.

It is an arithmetic number, because the mean of its divisors is an integer number (107587389).

Almost surely, 2^1222810660 is an apocalyptic number.

1222810660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222810660 is an abundant number, since it is smaller than the sum of its proper divisors (1359286676).

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

1222810660 is a wasteful number, since it uses less digits than its factorization.

1222810660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337983 (or 337981 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1222810660 is about 34968.7097274120. The cubic root of 1222810660 is about 1069.3496674125.

Adding to 1222810660 its reverse (660182221), we get a palindrome (1882992881).

The spelling of 1222810660 in words is "one billion, two hundred twenty-two million, eight hundred ten thousand, six hundred sixty".