16003996 has 12 divisors (see below), whose sum is σ = 28035952. Its totient is φ = 7993728.

The previous prime is 16003991. The next prime is 16003997. The reversal of 16003996 is 69930061.

It is a super-2 number, since 2×16003996² = 512255775936032, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

16003996 is a modest number, since divided by 3996 gives 16 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16003991) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4876 + ... + 7468.

Almost surely, 2^16003996 is an apocalyptic number.

It is an amenable number.

16003996 is a deficient number, since it is larger than the sum of its proper divisors (12031956).

16003996 is a wasteful number, since it uses less digits than its factorization.

16003996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140 (or 4138 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 16003996 is about 4000.4994688164. The cubic root of 16003996 is about 252.0051859183.

The spelling of 16003996 in words is "sixteen million, three thousand, nine hundred ninety-six".