85287285 has 12 divisors (see below), whose sum is σ = 147831372. Its totient is φ = 45486528.

The previous prime is 85287277. The next prime is 85287299. The reversal of 85287285 is 58278258.

It can be written as a sum of positive squares in 2 ways, for example, as 55442916 + 29844369 = 7446^2 + 5463^2 .

It is not a de Polignac number, because 85287285 - 2³ = 85287277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1895273 = 85287285 / (8 + 5 + 2 + 8 + 7 + 2 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 85287285.

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 11 ways as a sum of consecutive naturals, for example, 947592 + ... + 947681.

It is an arithmetic number, because the mean of its divisors is an integer number (12319281).

Almost surely, 2^85287285 is an apocalyptic number.

It is an amenable number.

85287285 is a deficient number, since it is larger than the sum of its proper divisors (62544087).

85287285 is a wasteful number, since it uses less digits than its factorization.

85287285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1895284 (or 1895281 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 85287285 is about 9235.1115315409. Note that the first 3 decimals coincide. The cubic root of 85287285 is about 440.1777604752.

The spelling of 85287285 in words is "eighty-five million, two hundred eighty-seven thousand, two hundred eighty-five".