83986868 has 72 divisors (see below), whose sum is σ = 181960128. Its totient is φ = 33214464.

The previous prime is 83986867. The next prime is 83986909. The reversal of 83986868 is 86868938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83986867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 784871 + ... + 784977.

It is an arithmetic number, because the mean of its divisors is an integer number (2527224).

Almost surely, 2^83986868 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 83986868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90980064).

83986868 is an abundant number, since it is smaller than the sum of its proper divisors (97973260).

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

83986868 is a wasteful number, since it uses less digits than its factorization.

83986868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 230 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 56.

The square root of 83986868 is about 9164.4349525762. The cubic root of 83986868 is about 437.9290906385.

The spelling of 83986868 in words is "eighty-three million, nine hundred eighty-six thousand, eight hundred sixty-eight".