12912288 has 24 divisors (see below), whose sum is σ = 33895008. Its totient is φ = 4304064.

The previous prime is 12912287. The next prime is 12912293. The reversal of 12912288 is 88221921.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (12912281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67156 + ... + 67347.

It is an arithmetic number, because the mean of its divisors is an integer number (1412292).

Almost surely, 2^12912288 is an apocalyptic number.

It is an amenable number.

12912288 is an abundant number, since it is smaller than the sum of its proper divisors (20982720).

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

12912288 is a wasteful number, since it uses less digits than its factorization.

12912288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134516 (or 134508 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 12912288 is about 3593.3672230931. The cubic root of 12912288 is about 234.6034537611.

The spelling of 12912288 in words is "twelve million, nine hundred twelve thousand, two hundred eighty-eight".