1380318305 has 4 divisors (see below), whose sum is σ = 1656381972. Its totient is φ = 1104254640.

The previous prime is 1380318299. The next prime is 1380318319. The reversal of 1380318305 is 5038130831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 797723536 + 582594769 = 28244^2 + 24137^2 .

It is not a de Polignac number, because 1380318305 - 2²⁶ = 1313209441 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138031826 + ... + 138031835.

It is an arithmetic number, because the mean of its divisors is an integer number (414095493).

Almost surely, 2^1380318305 is an apocalyptic number.

It is an amenable number.

1380318305 is a deficient number, since it is larger than the sum of its proper divisors (276063667).

1380318305 is an equidigital number, since it uses as much as digits as its factorization.

1380318305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276063666.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 1380318305 is about 37152.6352362790. The cubic root of 1380318305 is about 1113.4218740963.

The spelling of 1380318305 in words is "one billion, three hundred eighty million, three hundred eighteen thousand, three hundred five".