439387 has 8 divisors (see below), whose sum is σ = 480704. Its totient is φ = 399168.

The previous prime is 439381. The next prime is 439409. The reversal of 439387 is 783934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (439381) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 718 + ... + 1180.

It is an arithmetic number, because the mean of its divisors is an integer number (60088).

2⁴³⁹³⁸⁷ is an apocalyptic number.

439387 is a deficient number, since it is larger than the sum of its proper divisors (41317).

439387 is a wasteful number, since it uses less digits than its factorization.

439387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its digits is 18144, while the sum is 34.

The square root of 439387 is about 662.8627308878. The cubic root of 439387 is about 76.0237114380.

The spelling of 439387 in words is "four hundred thirty-nine thousand, three hundred eighty-seven".