12222780 has 24 divisors (see below), whose sum is σ = 34223952. Its totient is φ = 3259392.

The previous prime is 12222767. The next prime is 12222781. The reversal of 12222780 is 8722221.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12222780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101797 + ... + 101916.

It is an arithmetic number, because the mean of its divisors is an integer number (1425998).

Almost surely, 2^12222780 is an apocalyptic number.

12222780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12222780 is an abundant number, since it is smaller than the sum of its proper divisors (22001172).

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

12222780 is a wasteful number, since it uses less digits than its factorization.

12222780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203725 (or 203723 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 12222780 is about 3496.1092660270. The cubic root of 12222780 is about 230.3509450203.

The spelling of 12222780 in words is "twelve million, two hundred twenty-two thousand, seven hundred eighty".