1538532985 has 8 divisors (see below), whose sum is σ = 2014079616. Its totient is φ = 1118933040.

The previous prime is 1538532977. The next prime is 1538533049. The reversal of 1538532985 is 5892358351.

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

It is not a de Polignac number, because 1538532985 - 2³ = 1538532977 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, 13986609 + ... + 13986718.

It is an arithmetic number, because the mean of its divisors is an integer number (251759952).

Almost surely, 2^1538532985 is an apocalyptic number.

It is an amenable number.

1538532985 is a deficient number, since it is larger than the sum of its proper divisors (475546631).

1538532985 is a wasteful number, since it uses less digits than its factorization.

1538532985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27973343.

The product of its digits is 1296000, while the sum is 49.

The square root of 1538532985 is about 39224.1377852975. The cubic root of 1538532985 is about 1154.4335434385.

The spelling of 1538532985 in words is "one billion, five hundred thirty-eight million, five hundred thirty-two thousand, nine hundred eighty-five".