1317729338 has 16 divisors (see below), whose sum is σ = 2044863744. Its totient is φ = 636202080.

The previous prime is 1317729337. The next prime is 1317729341. The reversal of 1317729338 is 8339277131.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1317729337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5081 + ... + 51587.

It is an arithmetic number, because the mean of its divisors is an integer number (127803984).

Almost surely, 2^1317729338 is an apocalyptic number.

1317729338 is a deficient number, since it is larger than the sum of its proper divisors (727134406).

1317729338 is a wasteful number, since it uses less digits than its factorization.

1317729338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46997.

The product of its digits is 190512, while the sum is 44.

The square root of 1317729338 is about 36300.5418416861. The cubic root of 1317729338 is about 1096.3319524134.

The spelling of 1317729338 in words is "one billion, three hundred seventeen million, seven hundred twenty-nine thousand, three hundred thirty-eight".