216938304 has 224 divisors, whose sum is σ = 708842880. Its totient is φ = 64512000.

The previous prime is 216938303. The next prime is 216938329. The reversal of 216938304 is 403839612.

216938304 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 (216938303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1919752 + ... + 1919864.

Almost surely, 2^216938304 is an apocalyptic number.

216938304 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 216938304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354421440).

216938304 is an abundant number, since it is smaller than the sum of its proper divisors (491904576).

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

216938304 is a wasteful number, since it uses less digits than its factorization.

216938304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 216938304 is about 14728.8256150991. The cubic root of 216938304 is about 600.8675450049.

The spelling of 216938304 in words is "two hundred sixteen million, nine hundred thirty-eight thousand, three hundred four".