855138584 has 8 divisors (see below), whose sum is σ = 1603384860. Its totient is φ = 427569288.

The previous prime is 855138577. The next prime is 855138589. The reversal of 855138584 is 485831558.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (855138589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53446154 + ... + 53446169.

Almost surely, 2^855138584 is an apocalyptic number.

It is an amenable number.

855138584 is a deficient number, since it is larger than the sum of its proper divisors (748246276).

855138584 is a wasteful number, since it uses less digits than its factorization.

855138584 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106892329 (or 106892325 counting only the distinct ones).

The product of its digits is 768000, while the sum is 47.

The square root of 855138584 is about 29242.7526748082. The cubic root of 855138584 is about 949.1732730024.

The spelling of 855138584 in words is "eight hundred fifty-five million, one hundred thirty-eight thousand, five hundred eighty-four".