4478239 has 6 divisors (see below), whose sum is σ = 4533320. Its totient is φ = 4423800.

The previous prime is 4478237. The next prime is 4478249. The reversal of 4478239 is 9328744.

It is a happy number.

It is not a de Polignac number, because 4478239 - 2¹ = 4478237 is a prime.

It is a super-2 number, since 2×4478239² = 40109249082242, which contains 22 as substring.

It is a Duffinian number.

4478239 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 4478198 and 4478207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4478231) 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 5 ways as a sum of consecutive naturals, for example, 9982 + ... + 10420.

Almost surely, 2^4478239 is an apocalyptic number.

4478239 is a deficient number, since it is larger than the sum of its proper divisors (55081).

4478239 is an equidigital number, since it uses as much as digits as its factorization.

4478239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641 (or 540 counting only the distinct ones).

The product of its digits is 48384, while the sum is 37.

The square root of 4478239 is about 2116.1850108155. The cubic root of 4478239 is about 164.8298092109.

The spelling of 4478239 in words is "four million, four hundred seventy-eight thousand, two hundred thirty-nine".