85471236 has 36 divisors (see below), whose sum is σ = 223505100. Its totient is φ = 27507648.

The previous prime is 85471219. The next prime is 85471237. The reversal of 85471236 is 63217458.

It can be written as a sum of positive squares in 2 ways, for example, as 41990400 + 43480836 = 6480^2 + 6594^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 85471236.

It is not an unprimeable number, because it can be changed into a prime (85471237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39891 + ... + 41978.

It is an arithmetic number, because the mean of its divisors is an integer number (6208475).

Almost surely, 2^85471236 is an apocalyptic number.

It is an amenable number.

85471236 is an abundant number, since it is smaller than the sum of its proper divisors (138033864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85471236 is a wasteful number, since it uses less digits than its factorization.

85471236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81908 (or 81903 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 85471236 is about 9245.0654946301. The cubic root of 85471236 is about 440.4939975123.

The spelling of 85471236 in words is "eighty-five million, four hundred seventy-one thousand, two hundred thirty-six".