16998720 has 56 divisors (see below), whose sum is σ = 53973984. Its totient is φ = 4532736.

The previous prime is 16998719. The next prime is 16998721. The reversal of 16998720 is 2789961.

It is an interprime number because it is at equal distance from previous prime (16998719) and next prime (16998721).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16998721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7894 + ... + 9813.

Almost surely, 2^16998720 is an apocalyptic number.

16998720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16998720 is an abundant number, since it is smaller than the sum of its proper divisors (36975264).

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

16998720 is a wasteful number, since it uses less digits than its factorization.

16998720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17727 (or 17717 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 16998720 is about 4122.9503998957. The cubic root of 16998720 is about 257.1217054912.

It can be divided in two parts, 169 and 98720, that added together give a palindrome (98889).

The spelling of 16998720 in words is "sixteen million, nine hundred ninety-eight thousand, seven hundred twenty".