3995667 has 36 divisors (see below), whose sum is σ = 6508944. Its totient is φ = 2358720.

The previous prime is 3995659. The next prime is 3995671. The reversal of 3995667 is 7665993.

It is not a de Polignac number, because 3995667 - 2³ = 3995659 is a prime.

Its product of digits (306180) is a multiple of the sum of its prime factors (140).

It is not an unprimeable number, because it can be changed into a prime (3995627) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 56242 + ... + 56312.

It is an arithmetic number, because the mean of its divisors is an integer number (180804).

Almost surely, 2^3995667 is an apocalyptic number.

3995667 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3995667 is a deficient number, since it is larger than the sum of its proper divisors (2513277).

3995667 is a wasteful number, since it uses less digits than its factorization.

3995667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 124 counting only the distinct ones).

The product of its digits is 306180, while the sum is 45.

The square root of 3995667 is about 1998.9164564834. The cubic root of 3995667 is about 158.6827660813.

The spelling of 3995667 in words is "three million, nine hundred ninety-five thousand, six hundred sixty-seven".