12400332 has 36 divisors (see below), whose sum is σ = 33659640. Its totient is φ = 3542784.

The previous prime is 12400309. The next prime is 12400343. The reversal of 12400332 is 23300421.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9957 + ... + 11132.

It is an arithmetic number, because the mean of its divisors is an integer number (934990).

Almost surely, 2^12400332 is an apocalyptic number.

12400332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12400332 is an abundant number, since it is smaller than the sum of its proper divisors (21259308).

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

12400332 is a wasteful number, since it uses less digits than its factorization.

12400332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21110 (or 21101 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 12400332 is about 3521.4105128485. The cubic root of 12400332 is about 231.4609711427.

Adding to 12400332 its reverse (23300421), we get a palindrome (35700753).

The spelling of 12400332 in words is "twelve million, four hundred thousand, three hundred thirty-two".