83959780 has 48 divisors (see below), whose sum is σ = 183214080. Its totient is φ = 32284800.

The previous prime is 83959769. The next prime is 83959781. The reversal of 83959780 is 8795938.

It is not an unprimeable number, because it can be changed into a prime (83959781) 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, 118066 + ... + 118774.

It is an arithmetic number, because the mean of its divisors is an integer number (3816960).

Almost surely, 2^83959780 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 83959780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91607040).

83959780 is an abundant number, since it is smaller than the sum of its proper divisors (99254300).

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

83959780 is a wasteful number, since it uses less digits than its factorization.

83959780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 83959780 is about 9162.9569463138. The cubic root of 83959780 is about 437.8820043140.

The spelling of 83959780 in words is "eighty-three million, nine hundred fifty-nine thousand, seven hundred eighty".