16855128 has 120 divisors (see below), whose sum is σ = 51074100. Its totient is φ = 5178816.

The previous prime is 16855121. The next prime is 16855129. The reversal of 16855128 is 82155861.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 16855092 and 16855101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16855121) 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 29 ways as a sum of consecutive naturals, for example, 455526 + ... + 455562.

Almost surely, 2^16855128 is an apocalyptic number.

16855128 is a gapful number since it is divisible by the number (18) 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 16855128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25537050).

16855128 is an abundant number, since it is smaller than the sum of its proper divisors (34218972).

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

16855128 is a wasteful number, since it uses less digits than its factorization.

16855128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111 (or 61 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 16855128 is about 4105.4997259773. The cubic root of 16855128 is about 256.3956690703.

The spelling of 16855128 in words is "sixteen million, eight hundred fifty-five thousand, one hundred twenty-eight".