83889128 has 16 divisors (see below), whose sum is σ = 157467780. Its totient is φ = 41897728.

The previous prime is 83889121. The next prime is 83889137. The reversal of 83889128 is 82198838.

It can be written as a sum of positive squares in 2 ways, for example, as 83868964 + 20164 = 9158^2 + 142^2 .

It is not an unprimeable number, because it can be changed into a prime (83889121) 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, 2450 + ... + 13182.

Almost surely, 2^83889128 is an apocalyptic number.

It is an amenable number.

83889128 is a deficient number, since it is larger than the sum of its proper divisors (73578652).

83889128 is a wasteful number, since it uses less digits than its factorization.

83889128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11716 (or 11712 counting only the distinct ones).

The product of its digits is 221184, while the sum is 47.

The square root of 83889128 is about 9159.1008292299. The cubic root of 83889128 is about 437.7591442124.

The spelling of 83889128 in words is "eighty-three million, eight hundred eighty-nine thousand, one hundred twenty-eight".