3999628 has 6 divisors (see below), whose sum is σ = 6999356. Its totient is φ = 1999812.

The previous prime is 3999623. The next prime is 3999629. The reversal of 3999628 is 8269993.

It is a happy number.

3999628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3999623) 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 as a sum of consecutive naturals, namely, 499950 + ... + 499957.

Almost surely, 2^3999628 is an apocalyptic number.

It is an amenable number.

3999628 is a deficient number, since it is larger than the sum of its proper divisors (2999728).

3999628 is a wasteful number, since it uses less digits than its factorization.

3999628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999911 (or 999909 counting only the distinct ones).

The product of its digits is 209952, while the sum is 46.

The square root of 3999628 is about 1999.9069978376. The cubic root of 3999628 is about 158.7351841010.

The spelling of 3999628 in words is "three million, nine hundred ninety-nine thousand, six hundred twenty-eight".