3999936 has 56 divisors (see below), whose sum is σ = 10753344. Its totient is φ = 1312000.

The previous prime is 3999929. The next prime is 3999949. The reversal of 3999936 is 6399993.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15811 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (192024).

Almost surely, 2^3999936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5376672).

3999936 is an abundant number, since it is smaller than the sum of its proper divisors (6753408).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3999936 is a wasteful number, since it uses less digits than its factorization.

3999936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349 (or 339 counting only the distinct ones).

The product of its digits is 354294, while the sum is 48.

The square root of 3999936 is about 1999.9839999360. The cubic root of 3999936 is about 158.7392585784.

The spelling of 3999936 in words is "three million, nine hundred ninety-nine thousand, nine hundred thirty-six".