1317263740 has 36 divisors (see below), whose sum is σ = 2995418664. Its totient is φ = 486373056.

The previous prime is 1317263737. The next prime is 1317263741. The reversal of 1317263740 is 473627131.

It is a junction number, because it is equal to n+sod(n) for n = 1317263696 and 1317263705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317263741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 191482 + ... + 198241.

It is an arithmetic number, because the mean of its divisors is an integer number (83206074).

Almost surely, 2^1317263740 is an apocalyptic number.

1317263740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1317263740 is an abundant number, since it is smaller than the sum of its proper divisors (1678154924).

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

1317263740 is a wasteful number, since it uses less digits than its factorization.

1317263740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389758 (or 389743 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 1317263740 is about 36294.1281752297. The cubic root of 1317263740 is about 1096.2028135781.

The spelling of 1317263740 in words is "one billion, three hundred seventeen million, two hundred sixty-three thousand, seven hundred forty".