83138844 has 12 divisors (see below), whose sum is σ = 193990664. Its totient is φ = 27712944.

The previous prime is 83138843. The next prime is 83138849. The reversal of 83138844 is 44883138.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83138843) 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 3 ways as a sum of consecutive naturals, for example, 3464107 + ... + 3464130.

Almost surely, 2^83138844 is an apocalyptic number.

It is an amenable number.

83138844 is an abundant number, since it is smaller than the sum of its proper divisors (110851820).

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

83138844 is a wasteful number, since it uses less digits than its factorization.

83138844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928244 (or 6928242 counting only the distinct ones).

The product of its digits is 73728, while the sum is 39.

The square root of 83138844 is about 9118.0504495204. The cubic root of 83138844 is about 436.4501635073.

The spelling of 83138844 in words is "eighty-three million, one hundred thirty-eight thousand, eight hundred forty-four".