4220816 has 20 divisors (see below), whose sum is σ = 8218224. Its totient is φ = 2100000.

The previous prime is 4220813. The next prime is 4220819. The reversal of 4220816 is 6180224.

It is an interprime number because it is at equal distance from previous prime (4220813) and next prime (4220819).

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 4220791 and 4220800.

It is not an unprimeable number, because it can be changed into a prime (4220813) 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, 3491 + ... + 4541.

Almost surely, 2^4220816 is an apocalyptic number.

It is an amenable number.

4220816 is a deficient number, since it is larger than the sum of its proper divisors (3997408).

4220816 is a wasteful number, since it uses less digits than its factorization.

4220816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1310 (or 1304 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 4220816 is about 2054.4624601097. The cubic root of 4220816 is about 161.6089741120.

It can be divided in two parts, 42208 and 16, that added together give a palindrome (42224).

The spelling of 4220816 in words is "four million, two hundred twenty thousand, eight hundred sixteen".