4445220 has 96 divisors (see below), whose sum is σ = 13829760. Its totient is φ = 1059840.

The previous prime is 4445201. The next prime is 4445227. The reversal of 4445220 is 225444.

4445220 = T₃₉ + T₄₀ + ... + T₂₉₈.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (4445227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31911 + ... + 32049.

It is an arithmetic number, because the mean of its divisors is an integer number (144060).

Almost surely, 2^4445220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4445220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6914880).

4445220 is an abundant number, since it is smaller than the sum of its proper divisors (9384540).

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

4445220 is a wasteful number, since it uses less digits than its factorization.

4445220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 4445220 is about 2108.3690379058. The cubic root of 4445220 is about 164.4237011549.

The spelling of 4445220 in words is "four million, four hundred forty-five thousand, two hundred twenty".