4028724 has 72 divisors (see below), whose sum is σ = 12102720. Its totient is φ = 1135296.

The previous prime is 4028723. The next prime is 4028743. The reversal of 4028724 is 4278204.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4028723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55152 + ... + 55224.

Almost surely, 2^4028724 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 4028724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6051360).

4028724 is an abundant number, since it is smaller than the sum of its proper divisors (8073996).

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

4028724 is a wasteful number, since it uses less digits than its factorization.

4028724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 4028724 is about 2007.1681543907. The cubic root of 4028724 is about 159.1191701828.

The spelling of 4028724 in words is "four million, twenty-eight thousand, seven hundred twenty-four".