85471784 has 32 divisors (see below), whose sum is σ = 170683200. Its totient is φ = 39985920.

The previous prime is 85471783. The next prime is 85471811. The reversal of 85471784 is 48717458.

It is not an unprimeable number, because it can be changed into a prime (85471781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22589 + ... + 26099.

It is an arithmetic number, because the mean of its divisors is an integer number (5333850).

Almost surely, 2^85471784 is an apocalyptic number.

It is an amenable number.

85471784 is a deficient number, since it is larger than the sum of its proper divisors (85211416).

85471784 is a wasteful number, since it uses less digits than its factorization.

85471784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713 (or 3709 counting only the distinct ones).

The product of its digits is 250880, while the sum is 44.

The square root of 85471784 is about 9245.0951320146. The cubic root of 85471784 is about 440.4949389214.

The spelling of 85471784 in words is "eighty-five million, four hundred seventy-one thousand, seven hundred eighty-four".