3998975 has 12 divisors (see below), whose sum is σ = 5010096. Its totient is φ = 3166080.

The previous prime is 3998971. The next prime is 3998983. The reversal of 3998975 is 5798993.

It is not a de Polignac number, because 3998975 - 2² = 3998971 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 (3998971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1799 + ... + 3351.

It is an arithmetic number, because the mean of its divisors is an integer number (417508).

Almost surely, 2^3998975 is an apocalyptic number.

3998975 is a deficient number, since it is larger than the sum of its proper divisors (1011121).

3998975 is a wasteful number, since it uses less digits than its factorization.

3998975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666 (or 1661 counting only the distinct ones).

The product of its digits is 612360, while the sum is 50.

The square root of 3998975 is about 1999.7437335819. The cubic root of 3998975 is about 158.7265449878.

The spelling of 3998975 in words is "three million, nine hundred ninety-eight thousand, nine hundred seventy-five".