3999824 has 10 divisors (see below), whose sum is σ = 7749690. Its totient is φ = 1999904.

The previous prime is 3999803. The next prime is 3999851. The reversal of 3999824 is 4289993.

It can be written as a sum of positive squares in only one way, i.e., 2999824 + 1000000 = 1732^2 + 1000^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124979 + ... + 125010.

It is an arithmetic number, because the mean of its divisors is an integer number (774969).

Almost surely, 2^3999824 is an apocalyptic number.

It is an amenable number.

3999824 is a deficient number, since it is larger than the sum of its proper divisors (3749866).

3999824 is a wasteful number, since it uses less digits than its factorization.

3999824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249997 (or 249991 counting only the distinct ones).

The product of its digits is 139968, while the sum is 44.

The square root of 3999824 is about 1999.9559995160. The cubic root of 3999824 is about 158.7377769745.

The spelling of 3999824 in words is "three million, nine hundred ninety-nine thousand, eight hundred twenty-four".