16988140 has 48 divisors (see below), whose sum is σ = 38723328. Its totient is φ = 6223104.

The previous prime is 16988131. The next prime is 16988141. The reversal of 16988140 is 4188961.

It is a happy number.

It is a super-5 number, since 5×16988140⁵ (a number of 37 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16988140.

It is not an unprimeable number, because it can be changed into a prime (16988141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57834 + ... + 58126.

It is an arithmetic number, because the mean of its divisors is an integer number (806736).

Almost surely, 2^16988140 is an apocalyptic number.

16988140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16988140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19361664).

16988140 is an abundant number, since it is smaller than the sum of its proper divisors (21735188).

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

16988140 is a wasteful number, since it uses less digits than its factorization.

16988140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 536 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 16988140 is about 4121.6671384283. The cubic root of 16988140 is about 257.0683502539.

The spelling of 16988140 in words is "sixteen million, nine hundred eighty-eight thousand, one hundred forty".