212078868 has 12 divisors (see below), whose sum is σ = 494850720. Its totient is φ = 70692952.

The previous prime is 212078851. The next prime is 212078873. The reversal of 212078868 is 868870212.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×212078868² = 89954892504322848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8836608 + ... + 8836631.

It is an arithmetic number, because the mean of its divisors is an integer number (41237560).

Almost surely, 2^212078868 is an apocalyptic number.

It is an amenable number.

212078868 is an abundant number, since it is smaller than the sum of its proper divisors (282771852).

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

212078868 is a wasteful number, since it uses less digits than its factorization.

212078868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17673246 (or 17673244 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 212078868 is about 14562.9278649590. The cubic root of 212078868 is about 596.3471282335.

The spelling of 212078868 in words is "two hundred twelve million, seventy-eight thousand, eight hundred sixty-eight".