1391885585 has 8 divisors (see below), whose sum is σ = 1724142336. Its totient is φ = 1077588720.

The previous prime is 1391885543. The next prime is 1391885609. The reversal of 1391885585 is 5855881931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1391885585 - 2¹⁰ = 1391884561 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4489799 + ... + 4490108.

It is an arithmetic number, because the mean of its divisors is an integer number (215517792).

Almost surely, 2^1391885585 is an apocalyptic number.

It is an amenable number.

1391885585 is a deficient number, since it is larger than the sum of its proper divisors (332256751).

1391885585 is an equidigital number, since it uses as much as digits as its factorization.

1391885585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979943.

The product of its digits is 1728000, while the sum is 53.

The square root of 1391885585 is about 37307.9828589003. The cubic root of 1391885585 is about 1116.5234418915.

The spelling of 1391885585 in words is "one billion, three hundred ninety-one million, eight hundred eighty-five thousand, five hundred eighty-five".