1317780352 has 128 divisors (see below), whose sum is σ = 3080563200. Its totient is φ = 549918720.

The previous prime is 1317780341. The next prime is 1317780353. The reversal of 1317780352 is 2530877131.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×1317780352² = 3473090112234487808, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317780353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10059327 + ... + 10059457.

It is an arithmetic number, because the mean of its divisors is an integer number (24066900).

Almost surely, 2^1317780352 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 1317780352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1540281600).

1317780352 is an abundant number, since it is smaller than the sum of its proper divisors (1762782848).

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

1317780352 is a wasteful number, since it uses less digits than its factorization.

1317780352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 1317780352 is about 36301.2444965734. The cubic root of 1317780352 is about 1096.3460998702.

The spelling of 1317780352 in words is "one billion, three hundred seventeen million, seven hundred eighty thousand, three hundred fifty-two".