1232112440 has 128 divisors (see below), whose sum is σ = 3066336000. Its totient is φ = 442810368.

The previous prime is 1232112403. The next prime is 1232112449. The reversal of 1232112440 is 442112321.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1232112449) 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 31 ways as a sum of consecutive naturals, for example, 3655952 + ... + 3656288.

It is an arithmetic number, because the mean of its divisors is an integer number (23955750).

Almost surely, 2^1232112440 is an apocalyptic number.

1232112440 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 1232112440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1533168000).

1232112440 is an abundant number, since it is smaller than the sum of its proper divisors (1834223560).

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

1232112440 is a wasteful number, since it uses less digits than its factorization.

1232112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 525 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1232112440 is about 35101.4592289267. The cubic root of 1232112440 is about 1072.0542943281.

Adding to 1232112440 its reverse (442112321), we get a palindrome (1674224761).

The spelling of 1232112440 in words is "one billion, two hundred thirty-two million, one hundred twelve thousand, four hundred forty".