216928884 has 24 divisors (see below), whose sum is σ = 506435328. Its totient is φ = 72271360.

The previous prime is 216928843. The next prime is 216928897. The reversal of 216928884 is 488829612.

216928884 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×216928884³ (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, 27604 + ... + 34580.

It is an arithmetic number, because the mean of its divisors is an integer number (21101472).

Almost surely, 2^216928884 is an apocalyptic number.

It is an amenable number.

216928884 is an abundant number, since it is smaller than the sum of its proper divisors (289506444).

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

216928884 is a wasteful number, since it uses less digits than its factorization.

216928884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9575 (or 9573 counting only the distinct ones).

The product of its digits is 442368, while the sum is 48.

The square root of 216928884 is about 14728.5058305315. The cubic root of 216928884 is about 600.8588478252.

The spelling of 216928884 in words is "two hundred sixteen million, nine hundred twenty-eight thousand, eight hundred eighty-four".