16998984 has 80 divisors (see below), whose sum is σ = 48968700. Its totient is φ = 5505408.

The previous prime is 16998973. The next prime is 16999013. The reversal of 16998984 is 48989961.

It can be written as a sum of positive squares in 2 ways, for example, as 16990884 + 8100 = 4122^2 + 90^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 16998984.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 23622 + ... + 24330.

Almost surely, 2^16998984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16998984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24484350).

16998984 is an abundant number, since it is smaller than the sum of its proper divisors (31969716).

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

16998984 is a wasteful number, since it uses less digits than its factorization.

16998984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 751 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 16998984 is about 4122.9824156792. The cubic root of 16998984 is about 257.1230365675.

The spelling of 16998984 in words is "sixteen million, nine hundred ninety-eight thousand, nine hundred eighty-four".