4487728 has 40 divisors (see below), whose sum is σ = 10526112. Its totient is φ = 1809408.

The previous prime is 4487723. The next prime is 4487729. The reversal of 4487728 is 8277844.

It is a happy number.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

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

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (4487723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726 + ... + 3082.

Almost surely, 2^4487728 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 4487728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5263056).

4487728 is an abundant number, since it is smaller than the sum of its proper divisors (6038384).

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

4487728 is a wasteful number, since it uses less digits than its factorization.

4487728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2389 (or 2383 counting only the distinct ones).

The product of its digits is 100352, while the sum is 40.

The square root of 4487728 is about 2118.4258306582. The cubic root of 4487728 is about 164.9461471024.

The spelling of 4487728 in words is "four million, four hundred eighty-seven thousand, seven hundred twenty-eight".