16989288 has 16 divisors (see below), whose sum is σ = 42473280. Its totient is φ = 5663088.

The previous prime is 16989283. The next prime is 16989317. The reversal of 16989288 is 88298961.

It is a self number, because there is not a number n which added to its sum of digits gives 16989288.

It is not an unprimeable number, because it can be changed into a prime (16989283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353920 + ... + 353967.

It is an arithmetic number, because the mean of its divisors is an integer number (2654580).

Almost surely, 2^16989288 is an apocalyptic number.

It is an amenable number.

16989288 is an abundant number, since it is smaller than the sum of its proper divisors (25483992).

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

16989288 is a wasteful number, since it uses less digits than its factorization.

16989288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707896 (or 707892 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The square root of 16989288 is about 4121.8064001115. The cubic root of 16989288 is about 257.0741407214.

The spelling of 16989288 in words is "sixteen million, nine hundred eighty-nine thousand, two hundred eighty-eight".