12228615 has 24 divisors (see below), whose sum is σ = 24224928. Its totient is φ = 5590080.

The previous prime is 12228613. The next prime is 12228653. The reversal of 12228615 is 51682221.

It is a happy number.

12228615 is a `hidden beast` number, since 1 + 22 + 28 + 615 = 666.

It is not a de Polignac number, because 12228615 - 2¹ = 12228613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12228613) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19096 + ... + 19725.

It is an arithmetic number, because the mean of its divisors is an integer number (1009372).

Almost surely, 2^12228615 is an apocalyptic number.

12228615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12228615 is a deficient number, since it is larger than the sum of its proper divisors (11996313).

12228615 is a wasteful number, since it uses less digits than its factorization.

12228615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38839 (or 38836 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 12228615 is about 3496.9436655457. The cubic root of 12228615 is about 230.3875947278.

The spelling of 12228615 in words is "twelve million, two hundred twenty-eight thousand, six hundred fifteen".