12213768 has 32 divisors (see below), whose sum is σ = 34896960. Its totient is φ = 3489600.

The previous prime is 12213739. The next prime is 12213779. The reversal of 12213768 is 86731221.

It is a super-2 number, since 2×12213768² = 298352257515648, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

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, 36183 + ... + 36518.

It is an arithmetic number, because the mean of its divisors is an integer number (1090530).

Almost surely, 2^12213768 is an apocalyptic number.

It is an amenable number.

12213768 is an abundant number, since it is smaller than the sum of its proper divisors (22683192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12213768 is a wasteful number, since it uses less digits than its factorization.

12213768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72717 (or 72713 counting only the distinct ones).

The product of its digits is 4032, while the sum is 30.

The square root of 12213768 is about 3494.8201670472. The cubic root of 12213768 is about 230.2943176102.

Adding to 12213768 its reverse (86731221), we get a palindrome (98944989).

The spelling of 12213768 in words is "twelve million, two hundred thirteen thousand, seven hundred sixty-eight".