12287320 has 32 divisors (see below), whose sum is σ = 27987120. Its totient is φ = 4854400.

The previous prime is 12287309. The next prime is 12287321. The reversal of 12287320 is 2378221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12287321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1470 + ... + 5170.

Almost surely, 2^12287320 is an apocalyptic number.

12287320 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 12287320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13993560).

12287320 is an abundant number, since it is smaller than the sum of its proper divisors (15699800).

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

12287320 is a wasteful number, since it uses less digits than its factorization.

12287320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795 (or 3791 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 12287320 is about 3505.3273741549. The cubic root of 12287320 is about 230.7556745313.

Subtracting from 12287320 its reverse (2378221), we obtain a palindrome (9909099).

The spelling of 12287320 in words is "twelve million, two hundred eighty-seven thousand, three hundred twenty".