3999612 has 24 divisors (see below), whose sum is σ = 9452800. Its totient is φ = 1316016.

The previous prime is 3999599. The next prime is 3999623. The reversal of 3999612 is 2169993.

It is a happy number.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 1162 + ... + 3057.

Almost surely, 2^3999612 is an apocalyptic number.

It is an amenable number.

3999612 is an abundant number, since it is smaller than the sum of its proper divisors (5453188).

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

3999612 is a wasteful number, since it uses less digits than its factorization.

3999612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4305 (or 4303 counting only the distinct ones).

The product of its digits is 26244, while the sum is 39.

The square root of 3999612 is about 1999.9029976476. The cubic root of 3999612 is about 158.7349724341.

It can be divided in two parts, 399 and 9612, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 3999612 in words is "three million, nine hundred ninety-nine thousand, six hundred twelve".