4421648 has 80 divisors (see below), whose sum is σ = 11082624. Its totient is φ = 1658880.

The previous prime is 4421633. The next prime is 4421653. The reversal of 4421648 is 8461244.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4421648.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45536 + ... + 45632.

Almost surely, 2^4421648 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 4421648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5541312).

4421648 is an abundant number, since it is smaller than the sum of its proper divisors (6660976).

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

4421648 is a wasteful number, since it uses less digits than its factorization.

4421648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 154 counting only the distinct ones).

The product of its digits is 6144, while the sum is 29.

The square root of 4421648 is about 2102.7715044674. The cubic root of 4421648 is about 164.1325519683.

The spelling of 4421648 in words is "four million, four hundred twenty-one thousand, six hundred forty-eight".