439668 has 60 divisors (see below), whose sum is σ = 1219680. Its totient is φ = 137808.

The previous prime is 439667. The next prime is 439687. The reversal of 439668 is 866934.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7423 + ... + 7481.

It is an arithmetic number, because the mean of its divisors is an integer number (20328).

2⁴³⁹⁶⁶⁸ 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 439668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (609840).

439668 is an abundant number, since it is smaller than the sum of its proper divisors (780012).

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

439668 is a wasteful number, since it uses less digits than its factorization.

439668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 87 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 439668 is about 663.0746564302. The cubic root of 439668 is about 76.0399143984.

The spelling of 439668 in words is "four hundred thirty-nine thousand, six hundred sixty-eight".