1312330040 has 96 divisors (see below), whose sum is σ = 3495566880. Its totient is φ = 434348544.

The previous prime is 1312330039. The next prime is 1312330049. The reversal of 1312330040 is 400332131.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312330049) 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 23 ways as a sum of consecutive naturals, for example, 232694 + ... + 238266.

It is an arithmetic number, because the mean of its divisors is an integer number (36412155).

Almost surely, 2^1312330040 is an apocalyptic number.

1312330040 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 1312330040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1747783440).

1312330040 is an abundant number, since it is smaller than the sum of its proper divisors (2183236840).

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

1312330040 is a wasteful number, since it uses less digits than its factorization.

1312330040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5649 (or 5616 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1312330040 is about 36226.0961186822. The cubic root of 1312330040 is about 1094.8325230542.

Adding to 1312330040 its reverse (400332131), we get a palindrome (1712662171).

The spelling of 1312330040 in words is "one billion, three hundred twelve million, three hundred thirty thousand, forty".