12228777 has 24 divisors (see below), whose sum is σ = 19476288. Its totient is φ = 7332000.

The previous prime is 12228767. The next prime is 12228781. The reversal of 12228777 is 77782221.

12228777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12228777 - 2¹⁰ = 12227753 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12228707) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9388 + ... + 10610.

It is an arithmetic number, because the mean of its divisors is an integer number (811512).

Almost surely, 2^12228777 is an apocalyptic number.

It is an amenable number.

12228777 is a deficient number, since it is larger than the sum of its proper divisors (7247511).

12228777 is a wasteful number, since it uses less digits than its factorization.

12228777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1338 counting only the distinct ones).

The product of its digits is 21952, while the sum is 36.

The square root of 12228777 is about 3496.9668285530. The cubic root of 12228777 is about 230.3886120854.

It can be divided in two parts, 1222 and 8777, that added together give a palindrome (9999).

The spelling of 12228777 in words is "twelve million, two hundred twenty-eight thousand, seven hundred seventy-seven".