12228290 has 8 divisors (see below), whose sum is σ = 22010940. Its totient is φ = 4891312.

The previous prime is 12228289. The next prime is 12228299. The reversal of 12228290 is 9282221.

12228290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12187081 + 41209 = 3491^2 + 203^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12228299) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611405 + ... + 611424.

Almost surely, 2^12228290 is an apocalyptic number.

12228290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12228290 is a deficient number, since it is larger than the sum of its proper divisors (9782650).

12228290 is a wasteful number, since it uses less digits than its factorization.

12228290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222836.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 12228290 is about 3496.8971960868. The cubic root of 12228290 is about 230.3855537054.

The spelling of 12228290 in words is "twelve million, two hundred twenty-eight thousand, two hundred ninety".