16989798 has 32 divisors (see below), whose sum is σ = 40089600. Its totient is φ = 4697280.

The previous prime is 16989779. The next prime is 16989799. The reversal of 16989798 is 89798961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16989799) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5223 + ... + 7826.

It is an arithmetic number, because the mean of its divisors is an integer number (1252800).

Almost surely, 2^16989798 is an apocalyptic number.

16989798 is an abundant number, since it is smaller than the sum of its proper divisors (23099802).

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

16989798 is a wasteful number, since it uses less digits than its factorization.

16989798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13092.

The product of its digits is 1959552, while the sum is 57.

The square root of 16989798 is about 4121.8682657261. The cubic root of 16989798 is about 257.0767130580.

The spelling of 16989798 in words is "sixteen million, nine hundred eighty-nine thousand, seven hundred ninety-eight".