12289550 has 96 divisors (see below), whose sum is σ = 29289792. Its totient is φ = 3732480.

The previous prime is 12289531. The next prime is 12289559. The reversal of 12289550 is 5598221.

12289550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 168314 + ... + 168386.

It is an arithmetic number, because the mean of its divisors is an integer number (305102).

Almost surely, 2^12289550 is an apocalyptic number.

12289550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12289550 is an abundant number, since it is smaller than the sum of its proper divisors (17000242).

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

12289550 is a wasteful number, since it uses less digits than its factorization.

12289550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 12289550 is about 3505.6454469898. The cubic root of 12289550 is about 230.7696334751.

The spelling of 12289550 in words is "twelve million, two hundred eighty-nine thousand, five hundred fifty".