1312736260 has 108 divisors (see below), whose sum is σ = 3220585956. Its totient is φ = 449039360.

The previous prime is 1312736251. The next prime is 1312736281. The reversal of 1312736260 is 626372131.

It can be written as a sum of positive squares in 6 ways, for example, as 106007616 + 1206728644 = 10296^2 + 34738^2 .

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 698442 + ... + 700318.

Almost surely, 2^1312736260 is an apocalyptic number.

1312736260 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 1312736260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610292978).

1312736260 is an abundant number, since it is smaller than the sum of its proper divisors (1907849696).

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

1312736260 is a wasteful number, since it uses less digits than its factorization.

1312736260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 1912 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1312736260 is about 36231.7024165302. The cubic root of 1312736260 is about 1094.9454765982.

The spelling of 1312736260 in words is "one billion, three hundred twelve million, seven hundred thirty-six thousand, two hundred sixty".