1318711240 has 96 divisors (see below), whose sum is σ = 3727362240. Its totient is φ = 411016320.

The previous prime is 1318711181. The next prime is 1318711241. The reversal of 1318711240 is 421178131.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1318711199 and 1318711208.

It is not an unprimeable number, because it can be changed into a prime (1318711241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14419 + ... + 53341.

It is an arithmetic number, because the mean of its divisors is an integer number (38826690).

Almost surely, 2^1318711240 is an apocalyptic number.

1318711240 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 1318711240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1863681120).

1318711240 is an abundant number, since it is smaller than the sum of its proper divisors (2408651000).

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

1318711240 is a wasteful number, since it uses less digits than its factorization.

1318711240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38963 (or 38948 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1318711240 is about 36314.0639422249. The cubic root of 1318711240 is about 1096.6041942755.

Adding to 1318711240 its reverse (421178131), we get a palindrome (1739889371).

The spelling of 1318711240 in words is "one billion, three hundred eighteen million, seven hundred eleven thousand, two hundred forty".