85205578 has 8 divisors (see below), whose sum is σ = 127855620. Its totient is φ = 42587040.

The previous prime is 85205543. The next prime is 85205599. The reversal of 85205578 is 87550258.

It can be written as a sum of positive squares in 2 ways, for example, as 84400969 + 804609 = 9187^2 + 897^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 85205578.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798 + ... + 13078.

Almost surely, 2^85205578 is an apocalyptic number.

85205578 is a deficient number, since it is larger than the sum of its proper divisors (42650042).

85205578 is a wasteful number, since it uses less digits than its factorization.

85205578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15752.

The product of its (nonzero) digits is 112000, while the sum is 40.

The square root of 85205578 is about 9230.6867566828. The cubic root of 85205578 is about 440.0371490673.

The spelling of 85205578 in words is "eighty-five million, two hundred five thousand, five hundred seventy-eight".