212789816 has 32 divisors (see below), whose sum is σ = 444690000. Its totient is φ = 94864896.

The previous prime is 212789809. The next prime is 212789831. The reversal of 212789816 is 618987212.

It is an alternating number because its digits alternate between even and odd.

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, 38591 + ... + 43758.

Almost surely, 2^212789816 is an apocalyptic number.

It is an amenable number.

212789816 is an abundant number, since it is smaller than the sum of its proper divisors (231900184).

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

212789816 is a wasteful number, since it uses less digits than its factorization.

212789816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82391 (or 82387 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 212789816 is about 14587.3169568636. The cubic root of 212789816 is about 597.0127594126.

The spelling of 212789816 in words is "two hundred twelve million, seven hundred eighty-nine thousand, eight hundred sixteen".