4220428 has 12 divisors (see below), whose sum is σ = 7640640. Its totient is φ = 2037392.

The previous prime is 4220423. The next prime is 4220441. The reversal of 4220428 is 8240224.

It is a junction number, because it is equal to n+sod(n) for n = 4220399 and 4220408.

It is not an unprimeable number, because it can be changed into a prime (4220423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18076 + ... + 18307.

It is an arithmetic number, because the mean of its divisors is an integer number (636720).

Almost surely, 2^4220428 is an apocalyptic number.

It is an amenable number.

4220428 is a deficient number, since it is larger than the sum of its proper divisors (3420212).

4220428 is a wasteful number, since it uses less digits than its factorization.

4220428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36416 (or 36414 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4220428 is about 2054.3680293463. The cubic root of 4220428 is about 161.6040219729.

The spelling of 4220428 in words is "four million, two hundred twenty thousand, four hundred twenty-eight".