83689140 has 96 divisors (see below), whose sum is σ = 243855360. Its totient is φ = 21429376.

The previous prime is 83689139. The next prime is 83689163. The reversal of 83689140 is 4198638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166129 + ... + 166631.

It is an arithmetic number, because the mean of its divisors is an integer number (2540160).

Almost surely, 2^83689140 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 83689140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121927680).

83689140 is an abundant number, since it is smaller than the sum of its proper divisors (160166220).

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

83689140 is a wasteful number, since it uses less digits than its factorization.

83689140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 83689140 is about 9148.1768675513. The cubic root of 83689140 is about 437.4110012163.

The spelling of 83689140 in words is "eighty-three million, six hundred eighty-nine thousand, one hundred forty".