638324 has 24 divisors (see below), whose sum is σ = 1212960. Its totient is φ = 292896.

The previous prime is 638317. The next prime is 638327. The reversal of 638324 is 423836.

It is a junction number, because it is equal to n+sod(n) for n = 638293 and 638302.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 638324.

It is not an unprimeable number, because it can be changed into a prime (638327) by changing a digit.

638324 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 7 ways as a sum of consecutive naturals, for example, 2699 + ... + 2925.

It is an arithmetic number, because the mean of its divisors is an integer number (50540).

2⁶³⁸³²⁴ is an apocalyptic number.

It is an amenable number.

638324 is a deficient number, since it is larger than the sum of its proper divisors (574636).

638324 is a wasteful number, since it uses less digits than its factorization.

638324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287 (or 285 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 638324 is about 798.9518133154. The cubic root of 638324 is about 86.1020961619.

It can be divided in two parts, 63832 and 4, that added together give a palindrome (63836).

The spelling of 638324 in words is "six hundred thirty-eight thousand, three hundred twenty-four".