439866 has 24 divisors (see below), whose sum is σ = 1089504. Its totient is φ = 125640.

The previous prime is 439861. The next prime is 439867. The reversal of 439866 is 668934.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 439866.

It is not an unprimeable number, because it can be changed into a prime (439861) 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 11 ways as a sum of consecutive naturals, for example, 1620 + ... + 1871.

It is an arithmetic number, because the mean of its divisors is an integer number (45396).

2⁴³⁹⁸⁶⁶ is an apocalyptic number.

439866 is an abundant number, since it is smaller than the sum of its proper divisors (649638).

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

439866 is a wasteful number, since it uses less digits than its factorization.

439866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3506 (or 3503 counting only the distinct ones).

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

The square root of 439866 is about 663.2239440792. The cubic root of 439866 is about 76.0513272854.

The spelling of 439866 in words is "four hundred thirty-nine thousand, eight hundred sixty-six".