16887845 has 8 divisors (see below), whose sum is σ = 21824376. Its totient is φ = 12470976.

The previous prime is 16887833. The next prime is 16887877. The reversal of 16887845 is 54878861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 452929 + 16434916 = 673^2 + 4054^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16887845 - 2¹⁸ = 16625701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16887845.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129842 + ... + 129971.

It is an arithmetic number, because the mean of its divisors is an integer number (2728047).

Almost surely, 2^16887845 is an apocalyptic number.

It is an amenable number.

16887845 is a deficient number, since it is larger than the sum of its proper divisors (4936531).

16887845 is a wasteful number, since it uses less digits than its factorization.

16887845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259831.

The product of its digits is 430080, while the sum is 47.

The square root of 16887845 is about 4109.4823274958. The cubic root of 16887845 is about 256.5614559136.

The spelling of 16887845 in words is "sixteen million, eight hundred eighty-seven thousand, eight hundred forty-five".