1317978288 has 120 divisors (see below), whose sum is σ = 4046938896. Its totient is φ = 397094400.

The previous prime is 1317978287. The next prime is 1317978289. The reversal of 1317978288 is 8828797131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1317978287) and next prime (1317978289).

It is not an unprimeable number, because it can be changed into a prime (1317978287) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 284406 + ... + 289002.

Almost surely, 2^1317978288 is an apocalyptic number.

1317978288 is a gapful number since it is divisible by the number (18) 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 1317978288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2023469448).

1317978288 is an abundant number, since it is smaller than the sum of its proper divisors (2728960608).

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

1317978288 is a wasteful number, since it uses less digits than its factorization.

1317978288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4803 (or 4794 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 1317978288 is about 36303.9706919229. The cubic root of 1317978288 is about 1096.4009890119.

The spelling of 1317978288 in words is "one billion, three hundred seventeen million, nine hundred seventy-eight thousand, two hundred eighty-eight".