4220823 has 8 divisors (see below), whose sum is σ = 5639536. Its totient is φ = 2808000.

The previous prime is 4220819. The next prime is 4220851. The reversal of 4220823 is 3280224.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4220823 - 2² = 4220819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4220823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4220803) 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 7 ways as a sum of consecutive naturals, for example, 633 + ... + 2973.

It is an arithmetic number, because the mean of its divisors is an integer number (704942).

Almost surely, 2^4220823 is an apocalyptic number.

4220823 is a deficient number, since it is larger than the sum of its proper divisors (1418713).

4220823 is a wasteful number, since it uses less digits than its factorization.

4220823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2945.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 4220823 is about 2054.4641637176. The cubic root of 4220823 is about 161.6090634519.

The spelling of 4220823 in words is "four million, two hundred twenty thousand, eight hundred twenty-three".