638182875 has 64 divisors (see below), whose sum is σ = 1168307712. Its totient is φ = 306800000.

The previous prime is 638182859. The next prime is 638182889. The reversal of 638182875 is 578281836.

638182875 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 638182875 - 2⁴ = 638182859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 539785 + ... + 540965.

It is an arithmetic number, because the mean of its divisors is an integer number (18254808).

Almost surely, 2^638182875 is an apocalyptic number.

638182875 is a deficient number, since it is larger than the sum of its proper divisors (530124837).

638182875 is a wasteful number, since it uses less digits than its factorization.

638182875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341 (or 1331 counting only the distinct ones).

The product of its digits is 645120, while the sum is 48.

The square root of 638182875 is about 25262.2816665479. The cubic root of 638182875 is about 860.9575034905.

The spelling of 638182875 in words is "six hundred thirty-eight million, one hundred eighty-two thousand, eight hundred seventy-five".