12228416 has 28 divisors (see below), whose sum is σ = 24440388. Its totient is φ = 6070272.

The previous prime is 12228409. The next prime is 12228421. The reversal of 12228416 is 61482221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3841600 + 8386816 = 1960^2 + 2896^2 .

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 16.

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 3 ways as a sum of consecutive naturals, for example, 9440 + ... + 10656.

It is an arithmetic number, because the mean of its divisors is an integer number (872871).

Almost surely, 2^12228416 is an apocalyptic number.

12228416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12228416 is a deficient number, since it is larger than the sum of its proper divisors (12211972).

12228416 is a wasteful number, since it uses less digits than its factorization.

12228416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386 (or 1376 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 12228416 is about 3496.9152120119. The cubic root of 12228416 is about 230.3863449983.

The spelling of 12228416 in words is "twelve million, two hundred twenty-eight thousand, four hundred sixteen".