12227780 has 12 divisors (see below), whose sum is σ = 25678380. Its totient is φ = 4891104.

The previous prime is 12227779. The next prime is 12227783. The reversal of 12227780 is 8772221.

It can be written as a sum of positive squares in 2 ways, for example, as 2876416 + 9351364 = 1696^2 + 3058^2 .

It is not an unprimeable number, because it can be changed into a prime (12227783) 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 3 ways as a sum of consecutive naturals, for example, 305675 + ... + 305714.

It is an arithmetic number, because the mean of its divisors is an integer number (2139865).

Almost surely, 2^12227780 is an apocalyptic number.

12227780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12227780 is an abundant number, since it is smaller than the sum of its proper divisors (13450600).

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

12227780 is a wasteful number, since it uses less digits than its factorization.

12227780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611398 (or 611396 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12227780 is about 3496.8242735373. The cubic root of 12227780 is about 230.3823507973.

The spelling of 12227780 in words is "twelve million, two hundred twenty-seven thousand, seven hundred eighty".