3995664 has 20 divisors (see below), whose sum is σ = 10322256. Its totient is φ = 1331872.

The previous prime is 3995659. The next prime is 3995671. The reversal of 3995664 is 4665993.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41574 + ... + 41669.

Almost surely, 2^3995664 is an apocalyptic number.

It is an amenable number.

3995664 is an abundant number, since it is smaller than the sum of its proper divisors (6326592).

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

3995664 is a wasteful number, since it uses less digits than its factorization.

3995664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83254 (or 83248 counting only the distinct ones).

The product of its digits is 174960, while the sum is 42.

The square root of 3995664 is about 1998.9157060767. The cubic root of 3995664 is about 158.6827263676.

It can be divided in two parts, 39 and 95664, that added together give a triangular number (95703 = T₄₃₇).

The spelling of 3995664 in words is "three million, nine hundred ninety-five thousand, six hundred sixty-four".