16865916 has 12 divisors (see below), whose sum is σ = 39353832. Its totient is φ = 5621968.

The previous prime is 16865911. The next prime is 16865929. The reversal of 16865916 is 61956861.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16865911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702735 + ... + 702758.

It is an arithmetic number, because the mean of its divisors is an integer number (3279486).

Almost surely, 2^16865916 is an apocalyptic number.

It is an amenable number.

16865916 is an abundant number, since it is smaller than the sum of its proper divisors (22487916).

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

16865916 is a wasteful number, since it uses less digits than its factorization.

16865916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1405500 (or 1405498 counting only the distinct ones).

The product of its digits is 77760, while the sum is 42.

The square root of 16865916 is about 4106.8133631808. The cubic root of 16865916 is about 256.4503587879.

The spelling of 16865916 in words is "sixteen million, eight hundred sixty-five thousand, nine hundred sixteen".