638482823 has 4 divisors (see below), whose sum is σ = 696526728. Its totient is φ = 580438920.

The previous prime is 638482799. The next prime is 638482843. The reversal of 638482823 is 328284836.

638482823 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 638482823 - 2¹⁰ = 638481799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638482843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29021936 + ... + 29021957.

It is an arithmetic number, because the mean of its divisors is an integer number (174131682).

Almost surely, 2^638482823 is an apocalyptic number.

638482823 is a deficient number, since it is larger than the sum of its proper divisors (58043905).

638482823 is a wasteful number, since it uses less digits than its factorization.

638482823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58043904.

The product of its digits is 442368, while the sum is 44.

The square root of 638482823 is about 25268.2176458887. The cubic root of 638482823 is about 861.0923666275.

The spelling of 638482823 in words is "six hundred thirty-eight million, four hundred eighty-two thousand, eight hundred twenty-three".