12239864 has 128 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 4257792.

The previous prime is 12239863. The next prime is 12239869. The reversal of 12239864 is 46893221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12239861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284627 + ... + 284669.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

Almost surely, 2^12239864 is an apocalyptic number.

12239864 is a gapful number since it is divisible by the number (14) 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 12239864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15966720).

12239864 is an abundant number, since it is smaller than the sum of its proper divisors (19693576).

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

12239864 is a wasteful number, since it uses less digits than its factorization.

12239864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 105 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The square root of 12239864 is about 3498.5517003469. The cubic root of 12239864 is about 230.4582169469.

The spelling of 12239864 in words is "twelve million, two hundred thirty-nine thousand, eight hundred sixty-four".