638576285 has 8 divisors (see below), whose sum is σ = 791010816. Its totient is φ = 494381520.

The previous prime is 638576261. The next prime is 638576291. The reversal of 638576285 is 582675836.

638576285 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 638576285 - 2¹² = 638572189 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 2059769 + ... + 2060078.

It is an arithmetic number, because the mean of its divisors is an integer number (98876352).

Almost surely, 2^638576285 is an apocalyptic number.

It is an amenable number.

638576285 is a deficient number, since it is larger than the sum of its proper divisors (152434531).

638576285 is a wasteful number, since it uses less digits than its factorization.

638576285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4119883.

The product of its digits is 2419200, while the sum is 50.

The square root of 638576285 is about 25270.0669765634. The cubic root of 638576285 is about 861.1343805420.

The spelling of 638576285 in words is "six hundred thirty-eight million, five hundred seventy-six thousand, two hundred eighty-five".