16689885 has 32 divisors (see below), whose sum is σ = 28364160. Its totient is φ = 8356608.

The previous prime is 16689863. The next prime is 16689887. The reversal of 16689885 is 58898661.

It is not a de Polignac number, because 16689885 - 2⁵ = 16689853 is a prime.

It is a super-2 number, since 2×16689885² = 557104522626450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16689887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44559 + ... + 44931.

It is an arithmetic number, because the mean of its divisors is an integer number (886380).

Almost surely, 2^16689885 is an apocalyptic number.

16689885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16689885 is a deficient number, since it is larger than the sum of its proper divisors (11674275).

16689885 is a wasteful number, since it uses less digits than its factorization.

16689885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557.

The product of its digits is 829440, while the sum is 51.

The square root of 16689885 is about 4085.3255684217. The cubic root of 16689885 is about 255.5550386113. Note that the first 3 decimals are identical.

The spelling of 16689885 in words is "sixteen million, six hundred eighty-nine thousand, eight hundred eighty-five".