638302000 has 160 divisors (see below), whose sum is σ = 1782743040. Its totient is φ = 216518400.

The previous prime is 638301991. The next prime is 638302051. The reversal of 638302000 is 203836.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1777821 + ... + 1778179.

It is an arithmetic number, because the mean of its divisors is an integer number (11142144).

Almost surely, 2^638302000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 638302000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891371520).

638302000 is an abundant number, since it is smaller than the sum of its proper divisors (1144441040).

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

638302000 is a wasteful number, since it uses less digits than its factorization.

638302000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 500 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 638302000 is about 25264.6393205998. The cubic root of 638302000 is about 861.0110697361.

Adding to 638302000 its reverse (203836), we get a palindrome (638505836).

The spelling of 638302000 in words is "six hundred thirty-eight million, three hundred two thousand".