83644212 has 12 divisors (see below), whose sum is σ = 195169856. Its totient is φ = 27881400.

The previous prime is 83644193. The next prime is 83644243. The reversal of 83644212 is 21244638.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×83644212² = 13992708402201888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 83644212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3485164 + ... + 3485187.

Almost surely, 2^83644212 is an apocalyptic number.

It is an amenable number.

83644212 is an abundant number, since it is smaller than the sum of its proper divisors (111525644).

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

83644212 is a wasteful number, since it uses less digits than its factorization.

83644212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6970358 (or 6970356 counting only the distinct ones).

The product of its digits is 9216, while the sum is 30.

The square root of 83644212 is about 9145.7209666598. The cubic root of 83644212 is about 437.3327134034.

The spelling of 83644212 in words is "eighty-three million, six hundred forty-four thousand, two hundred twelve".