212730804 has 216 divisors, whose sum is σ = 667963296. Its totient is φ = 56246400.

The previous prime is 212730803. The next prime is 212730823. The reversal of 212730804 is 408037212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212730803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4947207 + ... + 4947249.

Almost surely, 2^212730804 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212730804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333981648).

212730804 is an abundant number, since it is smaller than the sum of its proper divisors (455232492).

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

212730804 is a wasteful number, since it uses less digits than its factorization.

212730804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 212730804 is about 14585.2941005658. The cubic root of 212730804 is about 596.9575653954.

The spelling of 212730804 in words is "two hundred twelve million, seven hundred thirty thousand, eight hundred four".