4278489 has 4 divisors (see below), whose sum is σ = 5704656. Its totient is φ = 2852324.

The previous prime is 4278487. The next prime is 4278499. The reversal of 4278489 is 9848724.

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.

It is a cyclic number.

It is not a de Polignac number, because 4278489 - 2¹ = 4278487 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 4278489.

It is not an unprimeable number, because it can be changed into a prime (4278481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 713079 + ... + 713084.

It is an arithmetic number, because the mean of its divisors is an integer number (1426164).

Almost surely, 2^4278489 is an apocalyptic number.

It is an amenable number.

4278489 is a deficient number, since it is larger than the sum of its proper divisors (1426167).

4278489 is a wasteful number, since it uses less digits than its factorization.

4278489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426166.

The product of its digits is 129024, while the sum is 42.

The square root of 4278489 is about 2068.4508696123. The cubic root of 4278489 is about 162.3417188565.

The spelling of 4278489 in words is "four million, two hundred seventy-eight thousand, four hundred eighty-nine".