85170228 has 48 divisors (see below), whose sum is σ = 233478336. Its totient is φ = 23823360.

The previous prime is 85170227. The next prime is 85170233. The reversal of 85170228 is 82207158.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85170227) 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 15 ways as a sum of consecutive naturals, for example, 23101 + ... + 26532.

It is an arithmetic number, because the mean of its divisors is an integer number (4864132).

Almost surely, 2^85170228 is an apocalyptic number.

It is an amenable number.

85170228 is an abundant number, since it is smaller than the sum of its proper divisors (148308108).

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

85170228 is a wasteful number, since it uses less digits than its factorization.

85170228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49664 (or 49662 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 85170228 is about 9228.7717492633. The cubic root of 85170228 is about 439.9762866008.

The spelling of 85170228 in words is "eighty-five million, one hundred seventy thousand, two hundred twenty-eight".