3998807 has 4 divisors (see below), whose sum is σ = 4083936. Its totient is φ = 3913680.

The previous prime is 3998801. The next prime is 3998809. The reversal of 3998807 is 7088993.

3998807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3998807 - 2⁸ = 3998551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42494 + ... + 42587.

It is an arithmetic number, because the mean of its divisors is an integer number (1020984).

Almost surely, 2^3998807 is an apocalyptic number.

3998807 is a deficient number, since it is larger than the sum of its proper divisors (85129).

3998807 is an equidigital number, since it uses as much as digits as its factorization.

3998807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85128.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3998807 is about 1999.7017277584. The cubic root of 3998807 is about 158.7243222155.

The spelling of 3998807 in words is "three million, nine hundred ninety-eight thousand, eight hundred seven".