4022728 has 8 divisors (see below), whose sum is σ = 7542630. Its totient is φ = 2011360.

The previous prime is 4022719. The next prime is 4022741. The reversal of 4022728 is 8272204.

4022728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2490084 + 1532644 = 1578^2 + 1238^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251413 + ... + 251428.

Almost surely, 2^4022728 is an apocalyptic number.

It is an amenable number.

4022728 is a deficient number, since it is larger than the sum of its proper divisors (3519902).

4022728 is a wasteful number, since it uses less digits than its factorization.

4022728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502847 (or 502843 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 4022728 is about 2005.6739515684. The cubic root of 4022728 is about 159.0401913086.

The spelling of 4022728 in words is "four million, twenty-two thousand, seven hundred twenty-eight".