3927728 has 20 divisors (see below), whose sum is σ = 8697360. Its totient is φ = 1683264.

The previous prime is 3927727. The next prime is 3927739. The reversal of 3927728 is 8277293.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3927691 and 3927700.

It is not an unprimeable number, because it can be changed into a prime (3927727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17423 + ... + 17646.

It is an arithmetic number, because the mean of its divisors is an integer number (434868).

Almost surely, 2^3927728 is an apocalyptic number.

It is an amenable number.

3927728 is an abundant number, since it is smaller than the sum of its proper divisors (4769632).

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

3927728 is a wasteful number, since it uses less digits than its factorization.

3927728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35084 (or 35078 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 3927728 is about 1981.8496411181. The cubic root of 3927728 is about 157.7782500519.

The spelling of 3927728 in words is "three million, nine hundred twenty-seven thousand, seven hundred twenty-eight".