1231444432 has 20 divisors (see below), whose sum is σ = 2387803396. Its totient is φ = 615237120.

The previous prime is 1231444427. The next prime is 1231444433. The reversal of 1231444432 is 2344441321.

It can be written as a sum of positive squares in 2 ways, for example, as 756030016 + 475414416 = 27496^2 + 21804^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1231444432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231444433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8919 + ... + 50422.

Almost surely, 2^1231444432 is an apocalyptic number.

It is an amenable number.

1231444432 is a deficient number, since it is larger than the sum of its proper divisors (1156358964).

1231444432 is a wasteful number, since it uses less digits than its factorization.

1231444432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60646 (or 60640 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 1231444432 is about 35091.9425509618. The cubic root of 1231444432 is about 1071.8605159350.

Adding to 1231444432 its reverse (2344441321), we get a palindrome (3575885753).

The spelling of 1231444432 in words is "one billion, two hundred thirty-one million, four hundred forty-four thousand, four hundred thirty-two".