3928665 has 16 divisors (see below), whose sum is σ = 6769728. Its totient is φ = 1934016.

The previous prime is 3928663. The next prime is 3928667. The reversal of 3928665 is 5668293.

It is an interprime number because it is at equal distance from previous prime (3928663) and next prime (3928667).

It is not a de Polignac number, because 3928665 - 2¹ = 3928663 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3928663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9879 + ... + 10268.

It is an arithmetic number, because the mean of its divisors is an integer number (423108).

Almost surely, 2^3928665 is an apocalyptic number.

It is an amenable number.

3928665 is a deficient number, since it is larger than the sum of its proper divisors (2841063).

3928665 is a wasteful number, since it uses less digits than its factorization.

3928665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20168.

The product of its digits is 77760, while the sum is 39.

The square root of 3928665 is about 1982.0860223512. The cubic root of 3928665 is about 157.7907955969.

The spelling of 3928665 in words is "three million, nine hundred twenty-eight thousand, six hundred sixty-five".