12289500 has 72 divisors (see below), whose sum is σ = 38783472. Its totient is φ = 3276000.

The previous prime is 12289499. The next prime is 12289507. The reversal of 12289500 is 598221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12289507) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3135 + ... + 5865.

Almost surely, 2^12289500 is an apocalyptic number.

12289500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12289500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19391736).

12289500 is an abundant number, since it is smaller than the sum of its proper divisors (26493972).

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

12289500 is a wasteful number, since it uses less digits than its factorization.

12289500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 12289500 is about 3505.6383156281. The cubic root of 12289500 is about 230.7693205128.

The spelling of 12289500 in words is "twelve million, two hundred eighty-nine thousand, five hundred".