4006728 has 48 divisors (see below), whose sum is σ = 11840400. Its totient is φ = 1213920.

The previous prime is 4006721. The next prime is 4006729. The reversal of 4006728 is 8276004.

It is not an unprimeable number, because it can be changed into a prime (4006721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1738 + ... + 3321.

It is an arithmetic number, because the mean of its divisors is an integer number (246675).

Almost surely, 2^4006728 is an apocalyptic number.

It is an amenable number.

4006728 is an abundant number, since it is smaller than the sum of its proper divisors (7833672).

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

4006728 is a wasteful number, since it uses less digits than its factorization.

4006728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082 (or 5075 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 4006728 is about 2001.6812933132. The cubic root of 4006728 is about 158.8290556295.

The spelling of 4006728 in words is "four million, six thousand, seven hundred twenty-eight".