538685985 has 16 divisors (see below), whose sum is σ = 862839936. Its totient is φ = 286985088.

The previous prime is 538685971. The next prime is 538685999. The reversal of 538685985 is 589586835.

It is an interprime number because it is at equal distance from previous prime (538685971) and next prime (538685999).

It is not a de Polignac number, because 538685985 - 2¹² = 538681889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5109 + ... + 33218.

It is an arithmetic number, because the mean of its divisors is an integer number (53927496).

Almost surely, 2^538685985 is an apocalyptic number.

It is an amenable number.

538685985 is a deficient number, since it is larger than the sum of its proper divisors (324153951).

538685985 is a wasteful number, since it uses less digits than its factorization.

538685985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39272.

The product of its digits is 10368000, while the sum is 57.

The square root of 538685985 is about 23209.6097554440. The cubic root of 538685985 is about 813.6642326684.

The spelling of 538685985 in words is "five hundred thirty-eight million, six hundred eighty-five thousand, nine hundred eighty-five".