638569023 has 8 divisors (see below), whose sum is σ = 852720000. Its totient is φ = 425065368.

The previous prime is 638569003. The next prime is 638569091. The reversal of 638569023 is 320965836.

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

It is not a de Polignac number, because 638569023 - 2⁵ = 638568991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638569003) by changing a digit.

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, 159523 + ... + 163476.

It is an arithmetic number, because the mean of its divisors is an integer number (106590000).

Almost surely, 2^638569023 is an apocalyptic number.

638569023 is a deficient number, since it is larger than the sum of its proper divisors (214150977).

638569023 is a wasteful number, since it uses less digits than its factorization.

638569023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323661.

The product of its (nonzero) digits is 233280, while the sum is 42.

The square root of 638569023 is about 25269.9232883679. The cubic root of 638569023 is about 861.1311162066.

The spelling of 638569023 in words is "six hundred thirty-eight million, five hundred sixty-nine thousand, twenty-three".