212573844 has 72 divisors (see below), whose sum is σ = 616412160. Its totient is φ = 60507072.

The previous prime is 212573833. The next prime is 212573869. The reversal of 212573844 is 448375212.

It is a happy number.

212573844 is a `hidden beast` number, since 2 + 1 + 2 + 573 + 84 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 212573799 and 212573808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72397 + ... + 75275.

It is an arithmetic number, because the mean of its divisors is an integer number (8561280).

Almost surely, 2^212573844 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 212573844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308206080).

212573844 is an abundant number, since it is smaller than the sum of its proper divisors (403838316).

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

212573844 is a wasteful number, since it uses less digits than its factorization.

212573844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189 (or 3184 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 212573844 is about 14579.9123454155. The cubic root of 212573844 is about 596.8107107607.

It can be divided in two parts, 212 and 573844, that added together give a triangular number (574056 = T₁₀₇₁).

The spelling of 212573844 in words is "two hundred twelve million, five hundred seventy-three thousand, eight hundred forty-four".