212789860 has 12 divisors (see below), whose sum is σ = 446858748. Its totient is φ = 85115936.

The previous prime is 212789851. The next prime is 212789861. The reversal of 212789860 is 68987212.

It can be written as a sum of positive squares in 2 ways, for example, as 41912676 + 170877184 = 6474^2 + 13072^2 .

It is not an unprimeable number, because it can be changed into a prime (212789861) 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, 5319727 + ... + 5319766.

It is an arithmetic number, because the mean of its divisors is an integer number (37238229).

Almost surely, 2^212789860 is an apocalyptic number.

212789860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212789860 is an abundant number, since it is smaller than the sum of its proper divisors (234068888).

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

212789860 is a wasteful number, since it uses less digits than its factorization.

212789860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10639502 (or 10639500 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 212789860 is about 14587.3184650230. The cubic root of 212789860 is about 597.0128005620.

The spelling of 212789860 in words is "two hundred twelve million, seven hundred eighty-nine thousand, eight hundred sixty".