85830218 has 4 divisors (see below), whose sum is σ = 128745330. Its totient is φ = 42915108.

The previous prime is 85830211. The next prime is 85830223. The reversal of 85830218 is 81203858.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55547209 + 30283009 = 7453^2 + 5503^2 .

It is not an unprimeable number, because it can be changed into a prime (85830211) by changing a digit.

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 as a sum of consecutive naturals, namely, 21457553 + ... + 21457556.

Almost surely, 2^85830218 is an apocalyptic number.

85830218 is a deficient number, since it is larger than the sum of its proper divisors (42915112).

85830218 is a wasteful number, since it uses less digits than its factorization.

85830218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42915111.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 85830218 is about 9264.4599410867. The cubic root of 85830218 is about 441.1098325613.

The spelling of 85830218 in words is "eighty-five million, eight hundred thirty thousand, two hundred eighteen".