16868140 has 48 divisors (see below), whose sum is σ = 37094400. Its totient is φ = 6435072.

The previous prime is 16868129. The next prime is 16868161. The reversal of 16868140 is 4186861.

It is a junction number, because it is equal to n+sod(n) for n = 16868096 and 16868105.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73546 + ... + 73774.

It is an arithmetic number, because the mean of its divisors is an integer number (772800).

Almost surely, 2^16868140 is an apocalyptic number.

16868140 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 16868140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18547200).

16868140 is an abundant number, since it is smaller than the sum of its proper divisors (20226260).

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

16868140 is a wasteful number, since it uses less digits than its factorization.

16868140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 16868140 is about 4107.0841238037. The cubic root of 16868140 is about 256.4616304462.

The spelling of 16868140 in words is "sixteen million, eight hundred sixty-eight thousand, one hundred forty".