212108688 has 120 divisors (see below), whose sum is σ = 651119040. Its totient is φ = 63924480.

The previous prime is 212108681. The next prime is 212108707. The reversal of 212108688 is 886801212.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (212108681) 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, 568470 + ... + 568842.

It is an arithmetic number, because the mean of its divisors is an integer number (5425992).

Almost surely, 2^212108688 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 212108688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325559520).

212108688 is an abundant number, since it is smaller than the sum of its proper divisors (439010352).

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

212108688 is a wasteful number, since it uses less digits than its factorization.

212108688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 748 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 212108688 is about 14563.9516615512. The cubic root of 212108688 is about 596.3750773295.

It can be divided in two parts, 212 and 108688, that added together give a square (108900 = 330²).

The spelling of 212108688 in words is "two hundred twelve million, one hundred eight thousand, six hundred eighty-eight".