83811138 has 8 divisors (see below), whose sum is σ = 167622288. Its totient is φ = 27937044.

The previous prime is 83811137. The next prime is 83811151. The reversal of 83811138 is 83111838.

It is a sphenic number, since it is the product of 3 distinct primes.

83811138 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 83811099 and 83811108.

It is not an unprimeable number, because it can be changed into a prime (83811137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6984256 + ... + 6984267.

It is an arithmetic number, because the mean of its divisors is an integer number (20952786).

Almost surely, 2^83811138 is an apocalyptic number.

83811138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

83811138 is a wasteful number, since it uses less digits than its factorization.

83811138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13968528.

The product of its digits is 4608, while the sum is 33.

The square root of 83811138 is about 9154.8423252397. The cubic root of 83811138 is about 437.6234435880.

The spelling of 83811138 in words is "eighty-three million, eight hundred eleven thousand, one hundred thirty-eight".