439505428 has 6 divisors (see below), whose sum is σ = 769134506. Its totient is φ = 219752712.

The previous prime is 439505377. The next prime is 439505431. The reversal of 439505428 is 824505934.

It can be written as a sum of positive squares in only one way, i.e., 380952324 + 58553104 = 19518^2 + 7652^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 54938175 + ... + 54938182.

Almost surely, 2^439505428 is an apocalyptic number.

It is an amenable number.

439505428 is a deficient number, since it is larger than the sum of its proper divisors (329629078).

439505428 is a wasteful number, since it uses less digits than its factorization.

439505428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109876361 (or 109876359 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 439505428 is about 20964.3847512871. The cubic root of 439505428 is about 760.3054104935.

The spelling of 439505428 in words is "four hundred thirty-nine million, five hundred five thousand, four hundred twenty-eight".