216750384 has 80 divisors (see below), whose sum is σ = 625852800. Its totient is φ = 71820864.

The previous prime is 216750377. The next prime is 216750389. The reversal of 216750384 is 483057612.

216750384 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216750389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75927 + ... + 78729.

It is an arithmetic number, because the mean of its divisors is an integer number (7823160).

Almost surely, 2^216750384 is an apocalyptic number.

216750384 is a gapful number since it is divisible by the number (24) 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 216750384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312926400).

216750384 is an abundant number, since it is smaller than the sum of its proper divisors (409102416).

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

216750384 is a wasteful number, since it uses less digits than its factorization.

216750384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2999 (or 2987 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 216750384 is about 14722.4449056534. Note that the first 3 decimals coincide. The cubic root of 216750384 is about 600.6939969708.

The spelling of 216750384 in words is "two hundred sixteen million, seven hundred fifty thousand, three hundred eighty-four".