85128238 has 16 divisors (see below), whose sum is σ = 138524400. Its totient is φ = 39001536.

The previous prime is 85128191. The next prime is 85128269. The reversal of 85128238 is 83282158.

It is a junction number, because it is equal to n+sod(n) for n = 85128197 and 85128206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8388 + ... + 15511.

It is an arithmetic number, because the mean of its divisors is an integer number (8657775).

Almost surely, 2^85128238 is an apocalyptic number.

85128238 is a deficient number, since it is larger than the sum of its proper divisors (53396162).

85128238 is a wasteful number, since it uses less digits than its factorization.

85128238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24051.

The product of its digits is 30720, while the sum is 37.

The square root of 85128238 is about 9226.4965181807. The cubic root of 85128238 is about 439.9039700898.

The spelling of 85128238 in words is "eighty-five million, one hundred twenty-eight thousand, two hundred thirty-eight".