4278823 has 4 divisors (see below), whose sum is σ = 4318920. Its totient is φ = 4238728.

The previous prime is 4278773. The next prime is 4278829. The reversal of 4278823 is 3288724.

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

It is a cyclic number.

It is not a de Polignac number, because 4278823 - 2²¹ = 2181671 is a prime.

It is a Duffinian number.

4278823 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4278829) 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, 19888 + ... + 20101.

It is an arithmetic number, because the mean of its divisors is an integer number (1079730).

Almost surely, 2^4278823 is an apocalyptic number.

4278823 is a deficient number, since it is larger than the sum of its proper divisors (40097).

4278823 is a wasteful number, since it uses less digits than its factorization.

4278823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40096.

The product of its digits is 21504, while the sum is 34.

The square root of 4278823 is about 2068.5316047864. The cubic root of 4278823 is about 162.3459431456.

Subtracting from 4278823 its reverse (3288724), we obtain a palindrome (990099).

The spelling of 4278823 in words is "four million, two hundred seventy-eight thousand, eight hundred twenty-three".