4220866 has 16 divisors (see below), whose sum is σ = 6922944. Its totient is φ = 1918224.

The previous prime is 4220861. The next prime is 4220873. The reversal of 4220866 is 6680224.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4220861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531 + ... + 2953.

It is an arithmetic number, because the mean of its divisors is an integer number (432684).

Almost surely, 2^4220866 is an apocalyptic number.

4220866 is a deficient number, since it is larger than the sum of its proper divisors (2702078).

4220866 is a wasteful number, since it uses less digits than its factorization.

4220866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2505.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 4220866 is about 2054.4746287068. The cubic root of 4220866 is about 161.6096122521.

The spelling of 4220866 in words is "four million, two hundred twenty thousand, eight hundred sixty-six".