16800000 has 216 divisors, whose sum is σ = 63870912. Its totient is φ = 3840000.

The previous prime is 16799989. The next prime is 16800023. The reversal of 16800000 is 861.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2399997 + ... + 2400003.

Almost surely, 2^16800000 is an apocalyptic number.

16800000 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 16800000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31935456).

16800000 is an abundant number, since it is smaller than the sum of its proper divisors (47070912).

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

16800000 is an frugal number, since it uses more digits than its factorization.

16800000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 16800000 is about 4098.7803063838. The cubic root of 16800000 is about 256.1158329975.

Adding to 16800000 its reverse (861), we get a palindrome (16800861).

The spelling of 16800000 in words is "sixteen million, eight hundred thousand".