1317789408 has 192 divisors, whose sum is σ = 3977890560. Its totient is φ = 378396672.

The previous prime is 1317789401. The next prime is 1317789409. The reversal of 1317789408 is 8049877131.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317789401) 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 31 ways as a sum of consecutive naturals, for example, 3797491 + ... + 3797837.

It is an arithmetic number, because the mean of its divisors is an integer number (20718180).

Almost surely, 2^1317789408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1317789408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1988945280).

1317789408 is an abundant number, since it is smaller than the sum of its proper divisors (2660101152).

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

1317789408 is a wasteful number, since it uses less digits than its factorization.

1317789408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 48.

The square root of 1317789408 is about 36301.3692303748. The cubic root of 1317789408 is about 1096.3486112871.

The spelling of 1317789408 in words is "one billion, three hundred seventeen million, seven hundred eighty-nine thousand, four hundred eight".