1312010440 has 64 divisors (see below), whose sum is σ = 3186635760. Its totient is φ = 483287040.

The previous prime is 1312010419. The next prime is 1312010467. The reversal of 1312010440 is 440102131.

It can be written as a sum of positive squares in 8 ways, for example, as 431226756 + 880783684 = 20766^2 + 29678^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234880 + ... + 240400.

Almost surely, 2^1312010440 is an apocalyptic number.

1312010440 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 1312010440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1593317880).

1312010440 is an abundant number, since it is smaller than the sum of its proper divisors (1874625320).

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

1312010440 is a wasteful number, since it uses less digits than its factorization.

1312010440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6002 (or 5998 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1312010440 is about 36221.6846654045. The cubic root of 1312010440 is about 1094.7436386850.

Adding to 1312010440 its reverse (440102131), we get a palindrome (1752112571).

The spelling of 1312010440 in words is "one billion, three hundred twelve million, ten thousand, four hundred forty".