3999606 has 32 divisors (see below), whose sum is σ = 8805888. Its totient is φ = 1203360.

The previous prime is 3999599. The next prime is 3999623. The reversal of 3999606 is 6069993.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3121 + ... + 4211.

It is an arithmetic number, because the mean of its divisors is an integer number (275184).

Almost surely, 2^3999606 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999606, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4402944).

3999606 is an abundant number, since it is smaller than the sum of its proper divisors (4806282).

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

3999606 is a wasteful number, since it uses less digits than its factorization.

3999606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 78732, while the sum is 42.

The square root of 3999606 is about 1999.9014975743. The cubic root of 3999606 is about 158.7348930589.

The spelling of 3999606 in words is "three million, nine hundred ninety-nine thousand, six hundred six".