85671886 has 4 divisors (see below), whose sum is σ = 128507832. Its totient is φ = 42835942.

The previous prime is 85671881. The next prime is 85671889. The reversal of 85671886 is 68817658.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85671881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21417970 + ... + 21417973.

It is an arithmetic number, because the mean of its divisors is an integer number (32126958).

Almost surely, 2^85671886 is an apocalyptic number.

85671886 is a deficient number, since it is larger than the sum of its proper divisors (42835946).

85671886 is a wasteful number, since it uses less digits than its factorization.

85671886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42835945.

The product of its digits is 645120, while the sum is 49.

The square root of 85671886 is about 9255.9108681966. The cubic root of 85671886 is about 440.8384254598.

The spelling of 85671886 in words is "eighty-five million, six hundred seventy-one thousand, eight hundred eighty-six".