4278889 has 4 divisors (see below), whose sum is σ = 4291924. Its totient is φ = 4265856.

The previous prime is 4278881. The next prime is 4278893. The reversal of 4278889 is 9888724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1010025 + 3268864 = 1005^2 + 1808^2 .

It is a cyclic number.

It is not a de Polignac number, because 4278889 - 2³ = 4278881 is a prime.

It is a Duffinian number.

4278889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (4278881) 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, 6012 + ... + 6685.

It is an arithmetic number, because the mean of its divisors is an integer number (1072981).

Almost surely, 2^4278889 is an apocalyptic number.

It is an amenable number.

4278889 is a deficient number, since it is larger than the sum of its proper divisors (13035).

4278889 is a wasteful number, since it uses less digits than its factorization.

4278889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13034.

The product of its digits is 258048, while the sum is 46.

The square root of 4278889 is about 2068.5475580706. The cubic root of 4278889 is about 162.3467778594.

It can be divided in two parts, 427 and 8889, that added together give a triangular number (9316 = T₁₃₆).

The spelling of 4278889 in words is "four million, two hundred seventy-eight thousand, eight hundred eighty-nine".