16003956 has 12 divisors (see below), whose sum is σ = 37342592. Its totient is φ = 5334648.

The previous prime is 16003937. The next prime is 16003957. The reversal of 16003956 is 65930061.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16003956² = 512253215299872, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16003957) 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, 666820 + ... + 666843.

Almost surely, 2^16003956 is an apocalyptic number.

It is an amenable number.

16003956 is an abundant number, since it is smaller than the sum of its proper divisors (21338636).

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

16003956 is a wasteful number, since it uses less digits than its factorization.

16003956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333670 (or 1333668 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 16003956 is about 4000.4944694375. The cubic root of 16003956 is about 252.0049759662.

The spelling of 16003956 in words is "sixteen million, three thousand, nine hundred fifty-six".