638267000 has 128 divisors (see below), whose sum is σ = 1797120000. Its totient is φ = 207273600.

The previous prime is 638266987. The next prime is 638267027. The reversal of 638267000 is 762836.

638267000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 130601 + ... + 135399.

It is an arithmetic number, because the mean of its divisors is an integer number (14040000).

Almost surely, 2^638267000 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 638267000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898560000).

638267000 is an abundant number, since it is smaller than the sum of its proper divisors (1158853000).

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

638267000 is a wasteful number, since it uses less digits than its factorization.

638267000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4846 (or 4832 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 638267000 is about 25263.9466433889. The cubic root of 638267000 is about 860.9953321812.

The spelling of 638267000 in words is "six hundred thirty-eight million, two hundred sixty-seven thousand".