4644220 has 48 divisors (see below), whose sum is σ = 11390400. Its totient is φ = 1589952.

The previous prime is 4644209. The next prime is 4644221. The reversal of 4644220 is 224464.

4644220 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 4644191 and 4644200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4644221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6522 + ... + 7198.

It is an arithmetic number, because the mean of its divisors is an integer number (237300).

Almost surely, 2^4644220 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 4644220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5695200).

4644220 is an abundant number, since it is smaller than the sum of its proper divisors (6746180).

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

4644220 is a wasteful number, since it uses less digits than its factorization.

4644220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4644220 is about 2155.0452431446. The cubic root of 4644220 is about 166.8415675051.

Adding to 4644220 its reverse (224464), we get a palindrome (4868684).

The spelling of 4644220 in words is "four million, six hundred forty-four thousand, two hundred twenty".