4391424 has 60 divisors (see below), whose sum is σ = 12687246. Its totient is φ = 1462272.

The previous prime is 4391417. The next prime is 4391437. The reversal of 4391424 is 4241934.

It can be written as a sum of positive squares in only one way, i.e., 3873024 + 518400 = 1968^2 + 720^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4132 + ... + 5084.

Almost surely, 2^4391424 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 4391424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6343623).

4391424 is an abundant number, since it is smaller than the sum of its proper divisors (8295822).

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

4391424 is an equidigital number, since it uses as much as digits as its factorization.

4391424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977 (or 958 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 4391424 is about 2095.5724754825. The cubic root of 4391424 is about 163.7577227677.

The spelling of 4391424 in words is "four million, three hundred ninety-one thousand, four hundred twenty-four".