4030728 has 32 divisors (see below), whose sum is σ = 10852800. Its totient is φ = 1240128.

The previous prime is 4030709. The next prime is 4030757. The reversal of 4030728 is 8270304.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 4030698 and 4030707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6148 + ... + 6771.

It is an arithmetic number, because the mean of its divisors is an integer number (339150).

Almost surely, 2^4030728 is an apocalyptic number.

It is an amenable number.

4030728 is an abundant number, since it is smaller than the sum of its proper divisors (6822072).

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

4030728 is a wasteful number, since it uses less digits than its factorization.

4030728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12941 (or 12937 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 4030728 is about 2007.6673031157. The cubic root of 4030728 is about 159.1455492513.

The spelling of 4030728 in words is "four million, thirty thousand, seven hundred twenty-eight".