439139144 has 16 divisors (see below), whose sum is σ = 823658220. Its totient is φ = 219496960.

The previous prime is 439139143. The next prime is 439139147. The reversal of 439139144 is 441931934.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 341880100 + 97259044 = 18490^2 + 9862^2 .

It is a junction number, because it is equal to n+sod(n) for n = 439139098 and 439139107.

It is not an unprimeable number, because it can be changed into a prime (439139143) 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, 23504 + ... + 37824.

Almost surely, 2^439139144 is an apocalyptic number.

It is an amenable number.

439139144 is a deficient number, since it is larger than the sum of its proper divisors (384519076).

439139144 is a wasteful number, since it uses less digits than its factorization.

439139144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18160 (or 18156 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 439139144 is about 20955.6470670796. The cubic root of 439139144 is about 760.0941388467.

The spelling of 439139144 in words is "four hundred thirty-nine million, one hundred thirty-nine thousand, one hundred forty-four".