4278439 has 12 divisors (see below), whose sum is σ = 4952920. Its totient is φ = 3682800.

The previous prime is 4278433. The next prime is 4278451. The reversal of 4278439 is 9348724.

It is a happy number.

It is not a de Polignac number, because 4278439 - 2³ = 4278431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4278398 and 4278407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1369 + ... + 3229.

Almost surely, 2^4278439 is an apocalyptic number.

4278439 is a deficient number, since it is larger than the sum of its proper divisors (674481).

4278439 is a wasteful number, since it uses less digits than its factorization.

4278439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902 (or 1891 counting only the distinct ones).

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

The square root of 4278439 is about 2068.4387832373. The cubic root of 4278439 is about 162.3410864590.

The spelling of 4278439 in words is "four million, two hundred seventy-eight thousand, four hundred thirty-nine".