1311888432 has 20 divisors (see below), whose sum is σ = 3389045240. Its totient is φ = 437296128.

The previous prime is 1311888337. The next prime is 1311888433. The reversal of 1311888432 is 2348881131.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1311888433) 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, 13665457 + ... + 13665552.

It is an arithmetic number, because the mean of its divisors is an integer number (169452262).

Almost surely, 2^1311888432 is an apocalyptic number.

1311888432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311888432 is an abundant number, since it is smaller than the sum of its proper divisors (2077156808).

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

1311888432 is a wasteful number, since it uses less digits than its factorization.

1311888432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27331020 (or 27331014 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 1311888432 is about 36220.0004417449. Note that the first 3 decimals coincide. The cubic root of 1311888432 is about 1094.7097030754.

The spelling of 1311888432 in words is "one billion, three hundred eleven million, eight hundred eighty-eight thousand, four hundred thirty-two".