212704128 has 192 divisors, whose sum is σ = 753698400. Its totient is φ = 56070144.

The previous prime is 212704111. The next prime is 212704159. The reversal of 212704128 is 821407212.

It is a tau number, because it is divible by the number of its divisors (192).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 103818 + ... + 105846.

Almost surely, 2^212704128 is an apocalyptic number.

212704128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212704128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376849200).

212704128 is an abundant number, since it is smaller than the sum of its proper divisors (540994272).

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

212704128 is a wasteful number, since it uses less digits than its factorization.

212704128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069 (or 2054 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 212704128 is about 14584.3795891358. The cubic root of 212704128 is about 596.9326119403.

The spelling of 212704128 in words is "two hundred twelve million, seven hundred four thousand, one hundred twenty-eight".