12220404 has 48 divisors (see below), whose sum is σ = 33264000. Its totient is φ = 3490368.

The previous prime is 12220393. The next prime is 12220421. The reversal of 12220404 is 40402221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2632 + ... + 5600.

It is an arithmetic number, because the mean of its divisors is an integer number (693000).

Almost surely, 2^12220404 is an apocalyptic number.

12220404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12220404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16632000).

12220404 is an abundant number, since it is smaller than the sum of its proper divisors (21043596).

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

12220404 is a wasteful number, since it uses less digits than its factorization.

12220404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2997 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 12220404 is about 3495.7694431984. The cubic root of 12220404 is about 230.3360179929.

Adding to 12220404 its reverse (40402221), we get a palindrome (52622625).

The spelling of 12220404 in words is "twelve million, two hundred twenty thousand, four hundred four".