12989628 has 18 divisors (see below), whose sum is σ = 32834984. Its totient is φ = 4329864.

The previous prime is 12989623. The next prime is 12989629. The reversal of 12989628 is 82698921.

12989628 is a `hidden beast` number, since 12 + 9 + 8 + 9 + 628 = 666.

12989628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 180376 + ... + 180447.

Almost surely, 2^12989628 is an apocalyptic number.

12989628 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

12989628 is an abundant number, since it is smaller than the sum of its proper divisors (19845356).

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

12989628 is a wasteful number, since it uses less digits than its factorization.

12989628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360833 (or 360828 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 12989628 is about 3604.1126508476. The cubic root of 12989628 is about 235.0709186894.

The spelling of 12989628 in words is "twelve million, nine hundred eighty-nine thousand, six hundred twenty-eight".