12989772 has 18 divisors (see below), whose sum is σ = 32835348. Its totient is φ = 4329912.

The previous prime is 12989747. The next prime is 12989773. The reversal of 12989772 is 27798921.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×12989772² = 337468353223968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12989773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180378 + ... + 180449.

It is an arithmetic number, because the mean of its divisors is an integer number (1824186).

Almost surely, 2^12989772 is an apocalyptic number.

12989772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12989772 is an abundant number, since it is smaller than the sum of its proper divisors (19845576).

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

12989772 is a wasteful number, since it uses less digits than its factorization.

12989772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360837 (or 360832 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 12989772 is about 3604.1326279703. The cubic root of 12989772 is about 235.0717873334.

The spelling of 12989772 in words is "twelve million, nine hundred eighty-nine thousand, seven hundred seventy-two".