12205404 has 72 divisors (see below), whose sum is σ = 33174960. Its totient is φ = 3919104.

The previous prime is 12205393. The next prime is 12205441. The reversal of 12205404 is 40450221.

12205404 is a `hidden beast` number, since 122 + 0 + 540 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27972 + ... + 28404.

Almost surely, 2^12205404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12205404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16587480).

12205404 is an abundant number, since it is smaller than the sum of its proper divisors (20969556).

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

12205404 is a wasteful number, since it uses less digits than its factorization.

12205404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12205404 is about 3493.6233340187. The cubic root of 12205404 is about 230.2417370163.

Adding to 12205404 its reverse (40450221), we get a palindrome (52655625).

The spelling of 12205404 in words is "twelve million, two hundred five thousand, four hundred four".