12187488 has 48 divisors (see below), whose sum is σ = 32417280. Its totient is φ = 4008576.

The previous prime is 12187477. The next prime is 12187489. The reversal of 12187488 is 88478121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12187489) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6781 + ... + 8387.

It is an arithmetic number, because the mean of its divisors is an integer number (675360).

Almost surely, 2^12187488 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 12187488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16208640).

12187488 is an abundant number, since it is smaller than the sum of its proper divisors (20229792).

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

12187488 is a wasteful number, since it uses less digits than its factorization.

12187488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1691 counting only the distinct ones).

The product of its digits is 28672, while the sum is 39.

The square root of 12187488 is about 3491.0582922661. The cubic root of 12187488 is about 230.1290265333.

The spelling of 12187488 in words is "twelve million, one hundred eighty-seven thousand, four hundred eighty-eight".