638883575 has 12 divisors (see below), whose sum is σ = 864235608. Its totient is φ = 464642400.

The previous prime is 638883547. The next prime is 638883577. The reversal of 638883575 is 575388836.

It is not a de Polignac number, because 638883575 - 2⁸ = 638883319 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 (638883577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1161332 + ... + 1161881.

It is an arithmetic number, because the mean of its divisors is an integer number (72019634).

Almost surely, 2^638883575 is an apocalyptic number.

638883575 is a deficient number, since it is larger than the sum of its proper divisors (225352033).

638883575 is a wasteful number, since it uses less digits than its factorization.

638883575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2323234 (or 2323229 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 53.

The square root of 638883575 is about 25276.1463637161. The cubic root of 638883575 is about 861.2724875339.

The spelling of 638883575 in words is "six hundred thirty-eight million, eight hundred eighty-three thousand, five hundred seventy-five".