12071228 has 24 divisors (see below), whose sum is σ = 23741088. Its totient is φ = 5328576.

The previous prime is 12071219. The next prime is 12071233. The reversal of 12071228 is 82217021.

It is a super-3 number, since 3×12071228³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3851 + ... + 6242.

It is an arithmetic number, because the mean of its divisors is an integer number (989212).

Almost surely, 2^12071228 is an apocalyptic number.

It is an amenable number.

12071228 is a deficient number, since it is larger than the sum of its proper divisors (11669860).

12071228 is a wasteful number, since it uses less digits than its factorization.

12071228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10133 (or 10131 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 12071228 is about 3474.3672805275. The cubic root of 12071228 is about 229.3949313608.

Adding to 12071228 its reverse (82217021), we get a palindrome (94288249).

The spelling of 12071228 in words is "twelve million, seventy-one thousand, two hundred twenty-eight".