85117228 has 36 divisors (see below), whose sum is σ = 172831120. Its totient is φ = 35927712.

The previous prime is 85117223. The next prime is 85117237. The reversal of 85117228 is 82271158.

It is a junction number, because it is equal to n+sod(n) for n = 85117193 and 85117202.

It is not an unprimeable number, because it can be changed into a prime (85117223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509601 + ... + 509767.

Almost surely, 2^85117228 is an apocalyptic number.

It is an amenable number.

85117228 is an abundant number, since it is smaller than the sum of its proper divisors (87713892).

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

85117228 is a wasteful number, since it uses less digits than its factorization.

85117228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454 (or 285 counting only the distinct ones).

The product of its digits is 8960, while the sum is 34.

The square root of 85117228 is about 9225.8998477113. The cubic root of 85117228 is about 439.8850043834.

The spelling of 85117228 in words is "eighty-five million, one hundred seventeen thousand, two hundred twenty-eight".