16989588 has 144 divisors (see below), whose sum is σ = 55770624. Its totient is φ = 4393440.

The previous prime is 16989569. The next prime is 16989593. The reversal of 16989588 is 88598961.

It is a super-2 number, since 2×16989588² = 577292200819488, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 74731 + ... + 74957.

It is an arithmetic number, because the mean of its divisors is an integer number (387296).

Almost surely, 2^16989588 is an apocalyptic number.

16989588 is a gapful number since it is divisible by the number (18) 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 16989588, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27885312).

16989588 is an abundant number, since it is smaller than the sum of its proper divisors (38781036).

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

16989588 is a wasteful number, since it uses less digits than its factorization.

16989588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264 (or 250 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 16989588 is about 4121.8427917620. The cubic root of 16989588 is about 257.0756538668.

The spelling of 16989588 in words is "sixteen million, nine hundred eighty-nine thousand, five hundred eighty-eight".