83785878 has 48 divisors (see below), whose sum is σ = 202889232. Its totient is φ = 24768000.

The previous prime is 83785861. The next prime is 83785921. The reversal of 83785878 is 87858738.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2958 + ... + 13278.

It is an arithmetic number, because the mean of its divisors is an integer number (4226859).

Almost surely, 2^83785878 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 83785878, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101444616).

83785878 is an abundant number, since it is smaller than the sum of its proper divisors (119103354).

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

83785878 is a wasteful number, since it uses less digits than its factorization.

83785878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10381 (or 10378 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 54.

The square root of 83785878 is about 9153.4626235103. The cubic root of 83785878 is about 437.5794737801.

The spelling of 83785878 in words is "eighty-three million, seven hundred eighty-five thousand, eight hundred seventy-eight".