4220646 has 8 divisors (see below), whose sum is σ = 8441304. Its totient is φ = 1406880.

The previous prime is 4220639. The next prime is 4220653. The reversal of 4220646 is 6460224.

It is an interprime number because it is at equal distance from previous prime (4220639) and next prime (4220653).

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

4220646 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 4⁷ + 2⁷ + 2¹¹ + 0 + 6 + 4¹¹ + 6⁵ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351715 + ... + 351726.

It is an arithmetic number, because the mean of its divisors is an integer number (1055163).

Almost surely, 2^4220646 is an apocalyptic number.

4220646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4220646 is a wasteful number, since it uses less digits than its factorization.

4220646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703446.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 4220646 is about 2054.4210863404. The cubic root of 4220646 is about 161.6068043977.

The spelling of 4220646 in words is "four million, two hundred twenty thousand, six hundred forty-six".