85170204 has 180 divisors, whose sum is σ = 275281776. Its totient is φ = 22415616.

The previous prime is 85170203. The next prime is 85170227. The reversal of 85170204 is 40207158.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85170203) 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 59 ways as a sum of consecutive naturals, for example, 1812109 + ... + 1812155.

Almost surely, 2^85170204 is an apocalyptic number.

85170204 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85170204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137640888).

85170204 is an abundant number, since it is smaller than the sum of its proper divisors (190111572).

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

85170204 is a wasteful number, since it uses less digits than its factorization.

85170204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 85170204 is about 9228.7704489818. The cubic root of 85170204 is about 439.9762452740.

The spelling of 85170204 in words is "eighty-five million, one hundred seventy thousand, two hundred four".