16560400 has 60 divisors (see below), whose sum is σ = 41899600. Its totient is φ = 6272640.

The previous prime is 16560389. The next prime is 16560407. The reversal of 16560400 is 406561.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16560407) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 6511 + ... + 8689.

Almost surely, 2^16560400 is an apocalyptic number.

16560400 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 16560400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20949800).

16560400 is an abundant number, since it is smaller than the sum of its proper divisors (25339200).

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

16560400 is a wasteful number, since it uses less digits than its factorization.

16560400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2205 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 16560400 is about 4069.4471368971. The cubic root of 16560400 is about 254.8924318826.

Adding to 16560400 its reverse (406561), we get a palindrome (16966961).

The spelling of 16560400 in words is "sixteen million, five hundred sixty thousand, four hundred".