439248389 has 4 divisors (see below), whose sum is σ = 439403424. Its totient is φ = 439093356.

The previous prime is 439248379. The next prime is 439248401. The reversal of 439248389 is 983842934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 983842934 = 2 ⋅491921467.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439248389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (439248379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73187 + ... + 78960.

It is an arithmetic number, because the mean of its divisors is an integer number (109850856).

Almost surely, 2^439248389 is an apocalyptic number.

It is an amenable number.

439248389 is a deficient number, since it is larger than the sum of its proper divisors (155035).

439248389 is a wasteful number, since it uses less digits than its factorization.

439248389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155034.

The product of its digits is 1492992, while the sum is 50.

The square root of 439248389 is about 20958.2534816239. The cubic root of 439248389 is about 760.1571633653.

The spelling of 439248389 in words is "four hundred thirty-nine million, two hundred forty-eight thousand, three hundred eighty-nine".