638232 has 64 divisors (see below), whose sum is σ = 1900800. Its totient is φ = 174720.

The previous prime is 638201. The next prime is 638233. The reversal of 638232 is 232836.

638232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638233) by changing a digit.

638232 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4807 + ... + 4937.

It is an arithmetic number, because the mean of its divisors is an integer number (29700).

2⁶³⁸²³² 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 638232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (950400).

638232 is an abundant number, since it is smaller than the sum of its proper divisors (1262568).

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

638232 is a wasteful number, since it uses less digits than its factorization.

638232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 172 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 638232 is about 798.8942358035. The cubic root of 638232 is about 86.0979594051.

The spelling of 638232 in words is "six hundred thirty-eight thousand, two hundred thirty-two".