12489390 has 80 divisors (see below), whose sum is σ = 35597232. Its totient is φ = 3131136.

The previous prime is 12489371. The next prime is 12489427. The reversal of 12489390 is 9398421.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 13317 + ... + 14223.

Almost surely, 2^12489390 is an apocalyptic number.

12489390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12489390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17798616).

12489390 is an abundant number, since it is smaller than the sum of its proper divisors (23107842).

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

12489390 is a wasteful number, since it uses less digits than its factorization.

12489390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943 (or 934 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 12489390 is about 3534.0331068059. The cubic root of 12489390 is about 232.0137600836.

The spelling of 12489390 in words is "twelve million, four hundred eighty-nine thousand, three hundred ninety".