12387288 has 64 divisors (see below), whose sum is σ = 33233760. Its totient is φ = 3833856.

The previous prime is 12387281. The next prime is 12387293. The reversal of 12387288 is 88278321.

12387288 = T₃₅₇ + T₃₅₈ + ... + T₄₉₂.

12387288 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39420 + ... + 39732.

Almost surely, 2^12387288 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 12387288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16616880).

12387288 is an abundant number, since it is smaller than the sum of its proper divisors (20846472).

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

12387288 is a wasteful number, since it uses less digits than its factorization.

12387288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 432 counting only the distinct ones).

The product of its digits is 43008, while the sum is 39.

The square root of 12387288 is about 3519.5579267857. The cubic root of 12387288 is about 231.3797841723.

The spelling of 12387288 in words is "twelve million, three hundred eighty-seven thousand, two hundred eighty-eight".