3999976 has 16 divisors (see below), whose sum is σ = 7826400. Its totient is φ = 1912944.

The previous prime is 3999971. The next prime is 4000037. The reversal of 3999976 is 6799993.

It is not an unprimeable number, because it can be changed into a prime (3999971) 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, 10686 + ... + 11053.

It is an arithmetic number, because the mean of its divisors is an integer number (489150).

Almost surely, 2^3999976 is an apocalyptic number.

It is an amenable number.

3999976 is a deficient number, since it is larger than the sum of its proper divisors (3826424).

3999976 is a wasteful number, since it uses less digits than its factorization.

3999976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21768 (or 21764 counting only the distinct ones).

The product of its digits is 826686, while the sum is 52.

The square root of 3999976 is about 1999.9939999910. The cubic root of 3999976 is about 158.7397877160.

The spelling of 3999976 in words is "three million, nine hundred ninety-nine thousand, nine hundred seventy-six".