439816 has 16 divisors (see below), whose sum is σ = 888300. Its totient is φ = 202944.

The previous prime is 439811. The next prime is 439823. The reversal of 439816 is 618934.

It can be written as a sum of positive squares in 2 ways, for example, as 427716 + 12100 = 654^2 + 110^2 .

It is a super-2 number, since 2×439816² = 386876227712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (439811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011 + ... + 2218.

2⁴³⁹⁸¹⁶ is an apocalyptic number.

It is an amenable number.

439816 is an abundant number, since it is smaller than the sum of its proper divisors (448484).

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

439816 is a wasteful number, since it uses less digits than its factorization.

439816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248 (or 4244 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 439816 is about 663.1862483496. The cubic root of 439816 is about 76.0484455665.

The spelling of 439816 in words is "four hundred thirty-nine thousand, eight hundred sixteen".