83081620 has 24 divisors (see below), whose sum is σ = 174661704. Its totient is φ = 33196416.

The previous prime is 83081591. The next prime is 83081627. The reversal of 83081620 is 2618038.

It can be written as a sum of positive squares in 4 ways, for example, as 39363076 + 43718544 = 6274^2 + 6612^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83081627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23914 + ... + 27166.

It is an arithmetic number, because the mean of its divisors is an integer number (7277571).

Almost surely, 2^83081620 is an apocalyptic number.

It is an amenable number.

83081620 is an abundant number, since it is smaller than the sum of its proper divisors (91580084).

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

83081620 is a wasteful number, since it uses less digits than its factorization.

83081620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4539 (or 4537 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 83081620 is about 9114.9119578853. The cubic root of 83081620 is about 436.3500051245.

Adding to 83081620 its reverse (2618038), we get a palindrome (85699658).

The spelling of 83081620 in words is "eighty-three million, eighty-one thousand, six hundred twenty".