3995867 has 4 divisors (see below), whose sum is σ = 4230936. Its totient is φ = 3760800.

The previous prime is 3995851. The next prime is 3995891. The reversal of 3995867 is 7685993.

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 3995867 - 2⁴ = 3995851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3995837) 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, 117509 + ... + 117542.

It is an arithmetic number, because the mean of its divisors is an integer number (1057734).

Almost surely, 2^3995867 is an apocalyptic number.

3995867 is a deficient number, since it is larger than the sum of its proper divisors (235069).

3995867 is a wasteful number, since it uses less digits than its factorization.

3995867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235068.

The product of its digits is 408240, while the sum is 47.

The square root of 3995867 is about 1998.9664829606. The cubic root of 3995867 is about 158.6854136179.

The spelling of 3995867 in words is "three million, nine hundred ninety-five thousand, eight hundred sixty-seven".