16001856 has 84 divisors (see below), whose sum is σ = 49417732. Its totient is φ = 4921344.

The previous prime is 16001851. The next prime is 16001863. The reversal of 16001856 is 65810061.

16001856 is a `hidden beast` number, since 1 + 600 + 1 + 8 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1440000 + 14561856 = 1200^2 + 3816^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16001851) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6420 + ... + 8556.

Almost surely, 2^16001856 is an apocalyptic number.

16001856 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 16001856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24708866).

16001856 is an abundant number, since it is smaller than the sum of its proper divisors (33415876).

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

16001856 is a wasteful number, since it uses less digits than its factorization.

16001856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2168 (or 2155 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 16001856 is about 4000.2319932724. The cubic root of 16001856 is about 251.9939529917.

The spelling of 16001856 in words is "sixteen million, one thousand, eight hundred fifty-six".