16857988728 has 128 divisors (see below), whose sum is σ = 49806213120. Its totient is φ = 4653060480.

The previous prime is 16857988663. The next prime is 16857988799. The reversal of 16857988728 is 82788975861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3367075 + ... + 3372077.

It is an arithmetic number, because the mean of its divisors is an integer number (389111040).

Almost surely, 2^16857988728 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 16857988728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24903106560).

16857988728 is an abundant number, since it is smaller than the sum of its proper divisors (32948224392).

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

16857988728 is a wasteful number, since it uses less digits than its factorization.

16857988728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5697 (or 5693 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 69.

The spelling of 16857988728 in words is "sixteen billion, eight hundred fifty-seven million, nine hundred eighty-eight thousand, seven hundred twenty-eight".