11431304440 has 32 divisors (see below), whose sum is σ = 25832772000. Its totient is φ = 4552550784.

The previous prime is 11431304399. The next prime is 11431304449. The reversal of 11431304440 is 4440313411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11431304449) 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, 614820 + ... + 633139.

It is an arithmetic number, because the mean of its divisors is an integer number (807274125).

Almost surely, 2^11431304440 is an apocalyptic number.

11431304440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11431304440 is an abundant number, since it is smaller than the sum of its proper divisors (14401467560).

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

11431304440 is a wasteful number, since it uses less digits than its factorization.

11431304440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248199 (or 1248195 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 11431304440 its reverse (4440313411), we get a palindrome (15871617851).

The spelling of 11431304440 in words is "eleven billion, four hundred thirty-one million, three hundred four thousand, four hundred forty".