12671988 has 72 divisors (see below), whose sum is σ = 35929152. Its totient is φ = 3459456.

The previous prime is 12671969. The next prime is 12672007. The reversal of 12671988 is 88917621.

It is an interprime number because it is at equal distance from previous prime (12671969) and next prime (12672007).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13056 + ... + 13992.

It is an arithmetic number, because the mean of its divisors is an integer number (499016).

Almost surely, 2^12671988 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 12671988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17964576).

12671988 is an abundant number, since it is smaller than the sum of its proper divisors (23257164).

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

12671988 is a wasteful number, since it uses less digits than its factorization.

12671988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981 (or 972 counting only the distinct ones).

The product of its digits is 48384, while the sum is 42.

The square root of 12671988 is about 3559.7735883059. The cubic root of 12671988 is about 233.1389937382.

The spelling of 12671988 in words is "twelve million, six hundred seventy-one thousand, nine hundred eighty-eight".