16689552 has 80 divisors (see below), whose sum is σ = 47788608. Its totient is φ = 4976640.

The previous prime is 16689523. The next prime is 16689593. The reversal of 16689552 is 25598661.

It is a super-2 number, since 2×16689552² = 557082291921408, which contains 22 as substring.

It is a nialpdrome in base 16.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 38328 + ... + 38760.

Almost surely, 2^16689552 is an apocalyptic number.

16689552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16689552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23894304).

16689552 is an abundant number, since it is smaller than the sum of its proper divisors (31099056).

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

16689552 is a wasteful number, since it uses less digits than its factorization.

16689552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 522 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 16689552 is about 4085.2848125926. The cubic root of 16689552 is about 255.5533389712.

The spelling of 16689552 in words is "sixteen million, six hundred eighty-nine thousand, five hundred fifty-two".