216018432 has 240 divisors, whose sum is σ = 735807072. Its totient is φ = 59719680.

The previous prime is 216018431. The next prime is 216018437. The reversal of 216018432 is 234810612.

216018432 is a `hidden beast` number, since 21 + 601 + 8 + 4 + 32 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 216018396 and 216018405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216018431) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1193382 + ... + 1193562.

Almost surely, 2^216018432 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216018432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367903536).

216018432 is an abundant number, since it is smaller than the sum of its proper divisors (519788640).

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

216018432 is a wasteful number, since it uses less digits than its factorization.

216018432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 216018432 is about 14697.5655126963. The cubic root of 216018432 is about 600.0170661812.

The spelling of 216018432 in words is "two hundred sixteen million, eighteen thousand, four hundred thirty-two".