439281 has 6 divisors (see below), whose sum is σ = 634530. Its totient is φ = 292848.

The previous prime is 439279. The next prime is 439289. The reversal of 439281 is 182934.

It can be written as a sum of positive squares in only one way, i.e., 349281 + 90000 = 591^2 + 300^2 .

It is not a de Polignac number, because 439281 - 2¹ = 439279 is a prime.

It is a super-2 number, since 2×439281² = 385935593922, which contains 22 as substring.

439281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (439289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24396 + ... + 24413.

It is an arithmetic number, because the mean of its divisors is an integer number (105755).

2⁴³⁹²⁸¹ is an apocalyptic number.

It is an amenable number.

439281 is a deficient number, since it is larger than the sum of its proper divisors (195249).

439281 is a wasteful number, since it uses less digits than its factorization.

439281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48815 (or 48812 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 439281 is about 662.7827698424. The cubic root of 439281 is about 76.0175974948.

The spelling of 439281 in words is "four hundred thirty-nine thousand, two hundred eighty-one".