4001996 has 12 divisors (see below), whose sum is σ = 7020552. Its totient is φ = 1996128.

The previous prime is 4001947. The next prime is 4001999. The reversal of 4001996 is 6991004.

It is not an unprimeable number, because it can be changed into a prime (4001999) 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, 1136 + ... + 3048.

It is an arithmetic number, because the mean of its divisors is an integer number (585046).

Almost surely, 2^4001996 is an apocalyptic number.

It is an amenable number.

4001996 is a deficient number, since it is larger than the sum of its proper divisors (3018556).

4001996 is a wasteful number, since it uses less digits than its factorization.

4001996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 4001996 is about 2000.4989377653. The cubic root of 4001996 is about 158.7665045770.

The spelling of 4001996 in words is "four million, one thousand, nine hundred ninety-six".