12227400 has 72 divisors (see below), whose sum is σ = 41069730. Its totient is φ = 3260160.

The previous prime is 12227377. The next prime is 12227419. The reversal of 12227400 is 472221.

It can be written as a sum of positive squares in 3 ways, for example, as 6380676 + 5846724 = 2526^2 + 2418^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 1597 + ... + 5196.

Almost surely, 2^12227400 is an apocalyptic number.

12227400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12227400 is an abundant number, since it is smaller than the sum of its proper divisors (28842330).

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

12227400 is a wasteful number, since it uses less digits than its factorization.

12227400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6815 (or 6803 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 12227400 is about 3496.7699381000. The cubic root of 12227400 is about 230.3799642589.

Adding to 12227400 its reverse (472221), we get a palindrome (12699621).

The spelling of 12227400 in words is "twelve million, two hundred twenty-seven thousand, four hundred".