83128115 has 32 divisors (see below), whose sum is σ = 119097216. Its totient is φ = 54512640.

The previous prime is 83128099. The next prime is 83128117. The reversal of 83128115 is 51182138.

It is not a de Polignac number, because 83128115 - 2⁴ = 83128099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (83128117) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75509 + ... + 76601.

It is an arithmetic number, because the mean of its divisors is an integer number (3721788).

Almost surely, 2^83128115 is an apocalyptic number.

83128115 is a deficient number, since it is larger than the sum of its proper divisors (35969101).

83128115 is a wasteful number, since it uses less digits than its factorization.

83128115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1199.

The product of its digits is 1920, while the sum is 29.

The square root of 83128115 is about 9117.4620920517. The cubic root of 83128115 is about 436.4313881871.

The spelling of 83128115 in words is "eighty-three million, one hundred twenty-eight thousand, one hundred fifteen".