83711980 has 48 divisors (see below), whose sum is σ = 198404640. Its totient is φ = 29388800.

The previous prime is 83711941. The next prime is 83711981. The reversal of 83711980 is 8911738.

It is not an unprimeable number, because it can be changed into a prime (83711981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (4133430).

Almost surely, 2^83711980 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 83711980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99202320).

83711980 is an abundant number, since it is smaller than the sum of its proper divisors (114692660).

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

83711980 is a wasteful number, since it uses less digits than its factorization.

83711980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13170 (or 13168 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 83711980 is about 9149.4251185525. The cubic root of 83711980 is about 437.4507895670.

The spelling of 83711980 in words is "eighty-three million, seven hundred eleven thousand, nine hundred eighty".