12323988 has 72 divisors (see below), whose sum is σ = 33429760. Its totient is φ = 3965760.

The previous prime is 12323981. The next prime is 12323999. The reversal of 12323988 is 88932321.

It is a happy number.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12323981) 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, 29928 + ... + 30336.

Almost surely, 2^12323988 is an apocalyptic number.

12323988 is a gapful number since it is divisible by the number (18) 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 12323988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16714880).

12323988 is an abundant number, since it is smaller than the sum of its proper divisors (21105772).

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

12323988 is a wasteful number, since it uses less digits than its factorization.

12323988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459 (or 445 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 12323988 is about 3510.5538024648. The cubic root of 12323988 is about 230.9849880614.

The spelling of 12323988 in words is "twelve million, three hundred twenty-three thousand, nine hundred eighty-eight".