85471785 has 48 divisors (see below), whose sum is σ = 178239360. Its totient is φ = 37013760.

The previous prime is 85471783. The next prime is 85471811. The reversal of 85471785 is 58717458.

85471785 = T₂₉₉₀ + T₂₉₉₁ + ... + T₃₀₀₈.

It is a happy number.

It is not a de Polignac number, because 85471785 - 2¹ = 85471783 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85471785.

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 47 ways as a sum of consecutive naturals, for example, 1156 + ... + 13125.

It is an arithmetic number, because the mean of its divisors is an integer number (3713320).

Almost surely, 2^85471785 is an apocalyptic number.

It is an amenable number.

85471785 is an abundant number, since it is smaller than the sum of its proper divisors (92767575).

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

85471785 is a wasteful number, since it uses less digits than its factorization.

85471785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14318 (or 14315 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 85471785 is about 9245.0951860973. The cubic root of 85471785 is about 440.4949406393.

The spelling of 85471785 in words is "eighty-five million, four hundred seventy-one thousand, seven hundred eighty-five".