439428730 has 24 divisors (see below), whose sum is σ = 856499292. Its totient is φ = 162249984.

The previous prime is 439428707. The next prime is 439428749. The reversal of 439428730 is 37824934.

It can be written as a sum of positive squares in 6 ways, for example, as 15768841 + 423659889 = 3971^2 + 20583^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128319 + ... + 131698.

Almost surely, 2^439428730 is an apocalyptic number.

439428730 is a deficient number, since it is larger than the sum of its proper divisors (417070562).

439428730 is a wasteful number, since it uses less digits than its factorization.

439428730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260050 (or 260037 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 439428730 is about 20962.5554262833. Note that the first 3 decimals coincide. The cubic root of 439428730 is about 760.2611810081.

It can be divided in two parts, 4394 and 28730, that added together give a square (33124 = 182²).

The spelling of 439428730 in words is "four hundred thirty-nine million, four hundred twenty-eight thousand, seven hundred thirty".