212836660 has 12 divisors (see below), whose sum is σ = 446957028. Its totient is φ = 85134656.

The previous prime is 212836643. The next prime is 212836667. The reversal of 212836660 is 66638212.

It is a happy number.

212836660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 72556324 + 140280336 = 8518^2 + 11844^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212836667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5320897 + ... + 5320936.

It is an arithmetic number, because the mean of its divisors is an integer number (37246419).

Almost surely, 2^212836660 is an apocalyptic number.

212836660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212836660 is an abundant number, since it is smaller than the sum of its proper divisors (234120368).

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

212836660 is a wasteful number, since it uses less digits than its factorization.

212836660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10641842 (or 10641840 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 212836660 is about 14588.9225099046. The cubic root of 212836660 is about 597.0565654153.

The spelling of 212836660 in words is "two hundred twelve million, eight hundred thirty-six thousand, six hundred sixty".