12109408 has 24 divisors (see below), whose sum is σ = 24878448. Its totient is φ = 5791104.

The previous prime is 12109381. The next prime is 12109411. The reversal of 12109408 is 80490121.

It is a happy number.

It is a super-2 number, since 2×12109408² = 293275524220928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7491 + ... + 8962.

It is an arithmetic number, because the mean of its divisors is an integer number (1036602).

Almost surely, 2^12109408 is an apocalyptic number.

It is an amenable number.

12109408 is an abundant number, since it is smaller than the sum of its proper divisors (12769040).

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

12109408 is a wasteful number, since it uses less digits than its factorization.

12109408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16486 (or 16478 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 12109408 is about 3479.8574683455. The cubic root of 12109408 is about 229.6365273503.

Adding to 12109408 its reverse (80490121), we get a palindrome (92599529).

The spelling of 12109408 in words is "twelve million, one hundred nine thousand, four hundred eight".