12689472 has 112 divisors (see below), whose sum is σ = 36210240. Its totient is φ = 3913728.

The previous prime is 12689423. The next prime is 12689477. The reversal of 12689472 is 27498621.

It is a super-2 number, since 2×12689472² = 322045399277568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12689472.

It is not an unprimeable number, because it can be changed into a prime (12689477) 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, 239398 + ... + 239450.

Almost surely, 2^12689472 is an apocalyptic number.

12689472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12689472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18105120).

12689472 is an abundant number, since it is smaller than the sum of its proper divisors (23520768).

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

12689472 is a wasteful number, since it uses less digits than its factorization.

12689472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 130 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 12689472 is about 3562.2285159714. The cubic root of 12689472 is about 233.2461678955.

It can be divided in two parts, 126 and 89472, that added together give a palindrome (89598).

The spelling of 12689472 in words is "twelve million, six hundred eighty-nine thousand, four hundred seventy-two".