3928867 has 4 divisors (see below), whose sum is σ = 4020280. Its totient is φ = 3837456.

The previous prime is 3928849. The next prime is 3928913. The reversal of 3928867 is 7688293.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3928867 - 2⁷ = 3928739 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 91369 = 3928867 / (3 + 9 + 2 + 8 + 8 + 6 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3928807) 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, 45642 + ... + 45727.

It is an arithmetic number, because the mean of its divisors is an integer number (1005070).

Almost surely, 2^3928867 is an apocalyptic number.

3928867 is a deficient number, since it is larger than the sum of its proper divisors (91413).

3928867 is an equidigital number, since it uses as much as digits as its factorization.

3928867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91412.

The product of its digits is 145152, while the sum is 43.

The square root of 3928867 is about 1982.1369781123. The cubic root of 3928867 is about 157.7934999248.

The spelling of 3928867 in words is "three million, nine hundred twenty-eight thousand, eight hundred sixty-seven".