216620800 has 216 divisors, whose sum is σ = 622741392. Its totient is φ = 73728000.

The previous prime is 216620779. The next prime is 216620813. The reversal of 216620800 is 8026612.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1196710 + ... + 1196890.

It is an arithmetic number, because the mean of its divisors is an integer number (2883062).

Almost surely, 2^216620800 is an apocalyptic number.

216620800 is a gapful number since it is divisible by the number (20) 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 216620800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311370696).

216620800 is an abundant number, since it is smaller than the sum of its proper divisors (406120592).

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

216620800 is a wasteful number, since it uses less digits than its factorization.

216620800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 216620800 is about 14718.0433482172. The cubic root of 216620800 is about 600.5742650056.

The spelling of 216620800 in words is "two hundred sixteen million, six hundred twenty thousand, eight hundred".