16995840 has 80 divisors (see below), whose sum is σ = 54358128. Its totient is φ = 4530176.

The previous prime is 16995833. The next prime is 16995851. The reversal of 16995840 is 4859961.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 16995792 and 16995801.

It is a congruent number.

It is an unprimeable number.

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, 6574 + ... + 8786.

Almost surely, 2^16995840 is an apocalyptic number.

16995840 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 16995840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27179064).

16995840 is an abundant number, since it is smaller than the sum of its proper divisors (37362288).

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

16995840 is an equidigital number, since it uses as much as digits as its factorization.

16995840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2239 (or 2223 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 16995840 is about 4122.6011206519. The cubic root of 16995840 is about 257.1071837638.

The spelling of 16995840 in words is "sixteen million, nine hundred ninety-five thousand, eight hundred forty".