216304650 has 72 divisors (see below), whose sum is σ = 606434400. Its totient is φ = 55170720.

The previous prime is 216304637. The next prime is 216304657. The reversal of 216304650 is 56403612.

216304650 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 0 + 4 + 650 = 666.

It is a super-2 number, since 2×216304650² = 93575403223245000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216304657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 100 + ... + 20799.

It is an arithmetic number, because the mean of its divisors is an integer number (8422700).

Almost surely, 2^216304650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216304650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303217200).

216304650 is an abundant number, since it is smaller than the sum of its proper divisors (390129750).

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

216304650 is a wasteful number, since it uses less digits than its factorization.

216304650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20940 (or 20932 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 216304650 is about 14707.2992082163. The cubic root of 216304650 is about 600.2819508188.

The spelling of 216304650 in words is "two hundred sixteen million, three hundred four thousand, six hundred fifty".