12220464 has 20 divisors (see below), whose sum is σ = 31569656. Its totient is φ = 4073472.

The previous prime is 12220457. The next prime is 12220489. The reversal of 12220464 is 46402221.

It is a self number, because there is not a number n which added to its sum of digits gives 12220464.

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, 127249 + ... + 127344.

Almost surely, 2^12220464 is an apocalyptic number.

It is an amenable number.

12220464 is an abundant number, since it is smaller than the sum of its proper divisors (19349192).

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

12220464 is a wasteful number, since it uses less digits than its factorization.

12220464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254604 (or 254598 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 12220464 is about 3495.7780249896. The cubic root of 12220464 is about 230.3363949619.

Adding to 12220464 its reverse (46402221), we get a palindrome (58622685).

The spelling of 12220464 in words is "twelve million, two hundred twenty thousand, four hundred sixty-four".