12489894 has 48 divisors (see below), whose sum is σ = 28473120. Its totient is φ = 3951360.

The previous prime is 12489877. The next prime is 12489899. The reversal of 12489894 is 49898421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12489899) by changing a digit.

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, 36894 + ... + 37230.

It is an arithmetic number, because the mean of its divisors is an integer number (593190).

Almost surely, 2^12489894 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12489894, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14236560).

12489894 is an abundant number, since it is smaller than the sum of its proper divisors (15983226).

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

12489894 is a wasteful number, since it uses less digits than its factorization.

12489894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445 (or 442 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 12489894 is about 3534.1044127190. The cubic root of 12489894 is about 232.0168809556.

The spelling of 12489894 in words is "twelve million, four hundred eighty-nine thousand, eight hundred ninety-four".