212238630 has 96 divisors (see below), whose sum is σ = 576785664. Its totient is φ = 56150496.

The previous prime is 212238629. The next prime is 212238661. The reversal of 212238630 is 36832212.

212238630 is a `hidden beast` number, since 2 + 1 + 2 + 23 + 8 + 630 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 212238594 and 212238603.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 405549 + ... + 406071.

It is an arithmetic number, because the mean of its divisors is an integer number (6008184).

Almost surely, 2^212238630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212238630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288392832).

212238630 is an abundant number, since it is smaller than the sum of its proper divisors (364547034).

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

212238630 is a wasteful number, since it uses less digits than its factorization.

212238630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 212238630 is about 14568.4120617176. The cubic root of 212238630 is about 596.4968362126.

The spelling of 212238630 in words is "two hundred twelve million, two hundred thirty-eight thousand, six hundred thirty".