85638278 has 8 divisors (see below), whose sum is σ = 140135400. Its totient is φ = 38926480.

The previous prime is 85638253. The next prime is 85638281. The reversal of 85638278 is 87283658.

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1946303 + ... + 1946346.

It is an arithmetic number, because the mean of its divisors is an integer number (17516925).

Almost surely, 2^85638278 is an apocalyptic number.

85638278 is a deficient number, since it is larger than the sum of its proper divisors (54497122).

85638278 is a wasteful number, since it uses less digits than its factorization.

85638278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3892662.

The product of its digits is 645120, while the sum is 47.

The square root of 85638278 is about 9254.0952015851. The cubic root of 85638278 is about 440.7807728028.

The spelling of 85638278 in words is "eighty-five million, six hundred thirty-eight thousand, two hundred seventy-eight".