4420818 has 40 divisors (see below), whose sum is σ = 10258380. Its totient is φ = 1421280.

The previous prime is 4420813. The next prime is 4420831. The reversal of 4420818 is 8180244.

It can be written as a sum of positive squares in 2 ways, for example, as 4397409 + 23409 = 2097^2 + 153^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 4420791 and 4420800.

It is not an unprimeable number, because it can be changed into a prime (4420813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4228 + ... + 5168.

Almost surely, 2^4420818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4420818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5129190).

4420818 is an abundant number, since it is smaller than the sum of its proper divisors (5837562).

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

4420818 is a wasteful number, since it uses less digits than its factorization.

4420818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984 (or 975 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 4420818 is about 2102.5741366240. The cubic root of 4420818 is about 164.1222813978.

The spelling of 4420818 in words is "four million, four hundred twenty thousand, eight hundred eighteen".