12227478 has 16 divisors (see below), whose sum is σ = 24800256. Its totient is φ = 4018280.

The previous prime is 12227459. The next prime is 12227483. The reversal of 12227478 is 87472221.

It is a super-2 number, since 2×12227478² = 299022436480968, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13926 + ... + 14777.

It is an arithmetic number, because the mean of its divisors is an integer number (1550016).

Almost surely, 2^12227478 is an apocalyptic number.

12227478 is an abundant number, since it is smaller than the sum of its proper divisors (12572778).

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

12227478 is a wasteful number, since it uses less digits than its factorization.

12227478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28779.

The product of its digits is 12544, while the sum is 33.

The square root of 12227478 is about 3496.7810912323. The cubic root of 12227478 is about 230.3804541313.

Adding to 12227478 its reverse (87472221), we get a palindrome (99699699).

The spelling of 12227478 in words is "twelve million, two hundred twenty-seven thousand, four hundred seventy-eight".