216000636 has 24 divisors (see below), whose sum is σ = 525915264. Its totient is φ = 68869680.

The previous prime is 216000601. The next prime is 216000641. The reversal of 216000636 is 636000612.

216000636 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×216000636³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391030 + ... + 391581.

It is an arithmetic number, because the mean of its divisors is an integer number (21913136).

Almost surely, 2^216000636 is an apocalyptic number.

It is an amenable number.

216000636 is an abundant number, since it is smaller than the sum of its proper divisors (309914628).

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

216000636 is a wasteful number, since it uses less digits than its factorization.

216000636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782641 (or 782639 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 216000636 is about 14696.9600938425. The cubic root of 216000636 is about 600.0005888883. Note that the first 3 decimals are identical.

Subtracting from 216000636 its sum of digits (24), we obtain a palindrome (216000612).

The spelling of 216000636 in words is "two hundred sixteen million, six hundred thirty-six", and thus it is an aban number.