16109856 has 144 divisors (see below), whose sum is σ = 53621568. Its totient is φ = 4492800.

The previous prime is 16109839. The next prime is 16109869. The reversal of 16109856 is 65890161.

It is a tau number, because it is divible by the number of its divisors (144).

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 16109856.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122911 + ... + 123041.

It is an arithmetic number, because the mean of its divisors is an integer number (372372).

Almost surely, 2^16109856 is an apocalyptic number.

16109856 is a gapful number since it is divisible by the number (16) 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 16109856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26810784).

16109856 is an abundant number, since it is smaller than the sum of its proper divisors (37511712).

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

16109856 is a wasteful number, since it uses less digits than its factorization.

16109856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 16109856 is about 4013.7085095956. The cubic root of 16109856 is about 252.5596029605.

The spelling of 16109856 in words is "sixteen million, one hundred nine thousand, eight hundred fifty-six".