638882000 has 40 divisors (see below), whose sum is σ = 1544821512. Its totient is φ = 255552000.

The previous prime is 638881993. The next prime is 638882029. The reversal of 638882000 is 288836.

It can be written as a sum of positive squares in 4 ways, for example, as 87759424 + 551122576 = 9368^2 + 23476^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157721 + ... + 161720.

Almost surely, 2^638882000 is an apocalyptic number.

It is an amenable number.

638882000 is an abundant number, since it is smaller than the sum of its proper divisors (905939512).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

638882000 is a wasteful number, since it uses less digits than its factorization.

638882000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319464 (or 319448 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 638882000 is about 25276.1152078400. The cubic root of 638882000 is about 861.2717797862.

It can be divided in two parts, 6388 and 82000, that added together give a palindrome (88388).

The spelling of 638882000 in words is "six hundred thirty-eight million, eight hundred eighty-two thousand".