12400232 has 16 divisors (see below), whose sum is σ = 25039140. Its totient is φ = 5723136.

The previous prime is 12400231. The next prime is 12400237. The reversal of 12400232 is 23200421.

12400232 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 10588516 + 1811716 = 3254^2 + 1346^2 .

It is not an unprimeable number, because it can be changed into a prime (12400231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59513 + ... + 59720.

Almost surely, 2^12400232 is an apocalyptic number.

It is an amenable number.

12400232 is an abundant number, since it is smaller than the sum of its proper divisors (12638908).

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

12400232 is a wasteful number, since it uses less digits than its factorization.

12400232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119252 (or 119248 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 12400232 is about 3521.3963139641. The cubic root of 12400232 is about 231.4603489507.

Adding to 12400232 its reverse (23200421), we get a palindrome (35600653).

It can be divided in two parts, 124002 and 32, that multiplied together give a square (3968064 = 1992²).

The spelling of 12400232 in words is "twelve million, four hundred thousand, two hundred thirty-two".