216804830 has 32 divisors (see below), whose sum is σ = 437240160. Its totient is φ = 76705920.

The previous prime is 216804799. The next prime is 216804901. The reversal of 216804830 is 38408612.

It is a super-2 number, since 2×216804830² = 94008668622657800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22565 + ... + 30704.

It is an arithmetic number, because the mean of its divisors is an integer number (13663755).

Almost surely, 2^216804830 is an apocalyptic number.

216804830 is an abundant number, since it is smaller than the sum of its proper divisors (220435330).

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

216804830 is a wasteful number, since it uses less digits than its factorization.

216804830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53324.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 216804830 is about 14724.2938710147. The cubic root of 216804830 is about 600.7442893036.

The spelling of 216804830 in words is "two hundred sixteen million, eight hundred four thousand, eight hundred thirty".