12318432 has 96 divisors (see below), whose sum is σ = 38610432. Its totient is φ = 3362304.

The previous prime is 12318431. The next prime is 12318437. The reversal of 12318432 is 23481321.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12318431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15058 + ... + 15854.

It is an arithmetic number, because the mean of its divisors is an integer number (402192).

Almost surely, 2^12318432 is an apocalyptic number.

12318432 is a gapful number since it is divisible by the number (12) 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 12318432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19305216).

12318432 is an abundant number, since it is smaller than the sum of its proper divisors (26292000).

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

12318432 is a wasteful number, since it uses less digits than its factorization.

12318432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840 (or 832 counting only the distinct ones).

The product of its digits is 1152, while the sum is 24.

The square root of 12318432 is about 3509.7623851195. The cubic root of 12318432 is about 230.9502713366.

Adding to 12318432 its reverse (23481321), we get a palindrome (35799753).

The spelling of 12318432 in words is "twelve million, three hundred eighteen thousand, four hundred thirty-two".