4397728 has 24 divisors (see below), whose sum is σ = 8824788. Its totient is φ = 2156544.

The previous prime is 4397717. The next prime is 4397737. The reversal of 4397728 is 8277934.

It can be written as a sum of positive squares in 2 ways, for example, as 4276624 + 121104 = 2068^2 + 348^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400 + ... + 2992.

Almost surely, 2^4397728 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 4397728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4412394).

4397728 is an abundant number, since it is smaller than the sum of its proper divisors (4427060).

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

4397728 is a wasteful number, since it uses less digits than its factorization.

4397728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656 (or 2648 counting only the distinct ones).

The product of its digits is 84672, while the sum is 40.

The square root of 4397728 is about 2097.0760596602. The cubic root of 4397728 is about 163.8360447501.

The spelling of 4397728 in words is "four million, three hundred ninety-seven thousand, seven hundred twenty-eight".