1222840812 has 48 divisors (see below), whose sum is σ = 2909460960. Its totient is φ = 399656448.

The previous prime is 1222840789. The next prime is 1222840813. The reversal of 1222840812 is 2180482221.

It is a self number, because there is not a number n which added to its sum of digits gives 1222840812.

It is not an unprimeable number, because it can be changed into a prime (1222840813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147514 + ... + 155582.

It is an arithmetic number, because the mean of its divisors is an integer number (60613770).

Almost surely, 2^1222840812 is an apocalyptic number.

1222840812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1222840812 is an abundant number, since it is smaller than the sum of its proper divisors (1686620148).

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

1222840812 is a wasteful number, since it uses less digits than its factorization.

1222840812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8322 (or 8320 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 1222840812 is about 34969.1408530436. The cubic root of 1222840812 is about 1069.3584566626.

The spelling of 1222840812 in words is "one billion, two hundred twenty-two million, eight hundred forty thousand, eight hundred twelve".