1311443432 has 32 divisors (see below), whose sum is σ = 2661456000. Its totient is φ = 602230464.

The previous prime is 1311443431. The next prime is 1311443443. The reversal of 1311443432 is 2343441131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (1311443431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10988 + ... + 52379.

It is an arithmetic number, because the mean of its divisors is an integer number (83170500).

Almost surely, 2^1311443432 is an apocalyptic number.

It is an amenable number.

1311443432 is an abundant number, since it is smaller than the sum of its proper divisors (1350012568).

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

1311443432 is a wasteful number, since it uses less digits than its factorization.

1311443432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63585 (or 63581 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 1311443432 is about 36213.8569058862. The cubic root of 1311443432 is about 1094.5859118298.

Adding to 1311443432 its reverse (2343441131), we get a palindrome (3654884563).

The spelling of 1311443432 in words is "one billion, three hundred eleven million, four hundred forty-three thousand, four hundred thirty-two".