1317255408 has 240 divisors, whose sum is σ = 4482649600. Its totient is φ = 352719360.

The previous prime is 1317255367. The next prime is 1317255439. The reversal of 1317255408 is 8045527131.

1317255408 is a `hidden beast` number, since 1 + 31 + 72 + 554 + 0 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2087253 + ... + 2087883.

Almost surely, 2^1317255408 is an apocalyptic number.

1317255408 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 1317255408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2241324800).

1317255408 is an abundant number, since it is smaller than the sum of its proper divisors (3165394192).

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

1317255408 is a wasteful number, since it uses less digits than its factorization.

1317255408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780 (or 771 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1317255408 is about 36294.0133906406. The cubic root of 1317255408 is about 1096.2005023272.

The spelling of 1317255408 in words is "one billion, three hundred seventeen million, two hundred fifty-five thousand, four hundred eight".