16856480 has 48 divisors (see below), whose sum is σ = 40166280. Its totient is φ = 6684672.

The previous prime is 16856443. The next prime is 16856501. The reversal of 16856480 is 8465861.

It can be written as a sum of positive squares in 4 ways, for example, as 13337104 + 3519376 = 3652^2 + 1876^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21536 + ... + 22304.

Almost surely, 2^16856480 is an apocalyptic number.

16856480 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 16856480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20083140).

16856480 is an abundant number, since it is smaller than the sum of its proper divisors (23309800).

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

16856480 is a wasteful number, since it uses less digits than its factorization.

16856480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921 (or 913 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 16856480 is about 4105.6643798538. The cubic root of 16856480 is about 256.4025243070.

The spelling of 16856480 in words is "sixteen million, eight hundred fifty-six thousand, four hundred eighty".