83878188 has 24 divisors (see below), whose sum is σ = 202030080. Its totient is φ = 27057360.

The previous prime is 83878183. The next prime is 83878189. The reversal of 83878188 is 88187838.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 83878188.

It is not an unprimeable number, because it can be changed into a prime (83878183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112368 + ... + 113111.

It is an arithmetic number, because the mean of its divisors is an integer number (8417920).

Almost surely, 2^83878188 is an apocalyptic number.

It is an amenable number.

83878188 is an abundant number, since it is smaller than the sum of its proper divisors (118151892).

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

83878188 is a wasteful number, since it uses less digits than its factorization.

83878188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225517 (or 225515 counting only the distinct ones).

The product of its digits is 688128, while the sum is 51.

The square root of 83878188 is about 9158.5035895609. The cubic root of 83878188 is about 437.7401139624.

The spelling of 83878188 in words is "eighty-three million, eight hundred seventy-eight thousand, one hundred eighty-eight".