3999928 has 16 divisors (see below), whose sum is σ = 7596000. Its totient is φ = 1974336.

The previous prime is 3999923. The next prime is 3999929. The reversal of 3999928 is 8299993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999923) 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, 2533 + ... + 3796.

It is an arithmetic number, because the mean of its divisors is an integer number (474750).

Almost surely, 2^3999928 is an apocalyptic number.

It is an amenable number.

3999928 is a deficient number, since it is larger than the sum of its proper divisors (3596072).

3999928 is a wasteful number, since it uses less digits than its factorization.

3999928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6414 (or 6410 counting only the distinct ones).

The product of its digits is 314928, while the sum is 49.

The square root of 3999928 is about 1999.9819999190. The cubic root of 3999928 is about 158.7391527505.

The spelling of 3999928 in words is "three million, nine hundred ninety-nine thousand, nine hundred twenty-eight".