1317112440 has 128 divisors (see below), whose sum is σ = 4523904000. Its totient is φ = 300515328.

The previous prime is 1317112439. The next prime is 1317112499. The reversal of 1317112440 is 442117131.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1317112440.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 644941 + ... + 646979.

It is an arithmetic number, because the mean of its divisors is an integer number (35343000).

Almost surely, 2^1317112440 is an apocalyptic number.

1317112440 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 1317112440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2261952000).

1317112440 is an abundant number, since it is smaller than the sum of its proper divisors (3206791560).

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

1317112440 is a wasteful number, since it uses less digits than its factorization.

1317112440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2829 (or 2825 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1317112440 is about 36292.0437561733. The cubic root of 1317112440 is about 1096.1608422727.

Adding to 1317112440 its reverse (442117131), we get a palindrome (1759229571).

The spelling of 1317112440 in words is "one billion, three hundred seventeen million, one hundred twelve thousand, four hundred forty".