639324 has 72 divisors (see below), whose sum is σ = 1921920. Its totient is φ = 175392.

The previous prime is 639311. The next prime is 639329. The reversal of 639324 is 423936.

639324 is a `hidden beast` number, since 639 + 3 + 24 = 666.

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 (639329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10807 + ... + 10865.

2⁶³⁹³²⁴ 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 639324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (960960).

639324 is an abundant number, since it is smaller than the sum of its proper divisors (1282596).

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

639324 is a wasteful number, since it uses less digits than its factorization.

639324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 114 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 639324 is about 799.5773883746. The cubic root of 639324 is about 86.1470352903.

It can be divided in two parts, 63932 and 4, that added together give a palindrome (63936).

The spelling of 639324 in words is "six hundred thirty-nine thousand, three hundred twenty-four".