16978998 has 16 divisors (see below), whose sum is σ = 34070256. Its totient is φ = 5640960.

The previous prime is 16978981. The next prime is 16978999. The reversal of 16978998 is 89987961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16978999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2643 + ... + 6398.

It is an arithmetic number, because the mean of its divisors is an integer number (2129391).

Almost surely, 2^16978998 is an apocalyptic number.

16978998 is an abundant number, since it is smaller than the sum of its proper divisors (17091258).

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

16978998 is a wasteful number, since it uses less digits than its factorization.

16978998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9359.

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

The square root of 16978998 is about 4120.5579719256. The cubic root of 16978998 is about 257.0222290472.

The spelling of 16978998 in words is "sixteen million, nine hundred seventy-eight thousand, nine hundred ninety-eight".