1317306240 has 160 divisors (see below), whose sum is σ = 4704523560. Its totient is φ = 351267840.

The previous prime is 1317306203. The next prime is 1317306259. The reversal of 1317306240 is 426037131.

1317306240 is a `hidden beast` number, since 1 + 3 + 1 + 7 + 30 + 624 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39135 + ... + 64545.

Almost surely, 2^1317306240 is an apocalyptic number.

1317306240 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 1317306240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2352261780).

1317306240 is an abundant number, since it is smaller than the sum of its proper divisors (3387217320).

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

1317306240 is an equidigital number, since it uses as much as digits as its factorization.

1317306240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25442 (or 25421 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1317306240 is about 36294.7136646647. The cubic root of 1317306240 is about 1096.2146026925.

The spelling of 1317306240 in words is "one billion, three hundred seventeen million, three hundred six thousand, two hundred forty".