1318762440 has 96 divisors (see below), whose sum is σ = 4291892280. Its totient is φ = 351184896.

The previous prime is 1318762373. The next prime is 1318762451. The reversal of 1318762440 is 442678131.

1318762440 is a `hidden beast` number, since 13 + 18 + 7 + 624 + 4 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1318125636 + 636804 = 36306^2 + 798^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1318762395 and 1318762404.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 313632 + ... + 317808.

Almost surely, 2^1318762440 is an apocalyptic number.

1318762440 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 1318762440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2145946140).

1318762440 is an abundant number, since it is smaller than the sum of its proper divisors (2973129840).

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

1318762440 is a wasteful number, since it uses less digits than its factorization.

1318762440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071 (or 5064 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 1318762440 is about 36314.7688964146. The cubic root of 1318762440 is about 1096.6183862650.

The spelling of 1318762440 in words is "one billion, three hundred eighteen million, seven hundred sixty-two thousand, four hundred forty".