439869 has 8 divisors (see below), whose sum is σ = 617440. Its totient is φ = 277776.

The previous prime is 439867. The next prime is 439883. The reversal of 439869 is 968934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 439869 - 2¹ = 439867 is a prime.

It is a super-2 number, since 2×439869² = 386969474322, which contains 22 as substring.

It is a Duffinian number.

439869 is a lucky number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3802 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (77180).

2⁴³⁹⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

439869 is a deficient number, since it is larger than the sum of its proper divisors (177571).

439869 is a wasteful number, since it uses less digits than its factorization.

439869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7739.

The product of its digits is 46656, while the sum is 39.

The square root of 439869 is about 663.2262057549. The cubic root of 439869 is about 76.0515001816.

The spelling of 439869 in words is "four hundred thirty-nine thousand, eight hundred sixty-nine".