83138420 has 12 divisors (see below), whose sum is σ = 174590724. Its totient is φ = 33255360.

The previous prime is 83138411. The next prime is 83138423. The reversal of 83138420 is 2483138.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 35307364 + 47831056 = 5942^2 + 6916^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83138423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2078441 + ... + 2078480.

It is an arithmetic number, because the mean of its divisors is an integer number (14549227).

Almost surely, 2^83138420 is an apocalyptic number.

It is an amenable number.

83138420 is an abundant number, since it is smaller than the sum of its proper divisors (91452304).

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

83138420 is a wasteful number, since it uses less digits than its factorization.

83138420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4156930 (or 4156928 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 83138420 is about 9118.0271989066. The cubic root of 83138420 is about 436.4494215550.

The spelling of 83138420 in words is "eighty-three million, one hundred thirty-eight thousand, four hundred twenty".