85820785 has 8 divisors (see below), whose sum is σ = 103073256. Its totient is φ = 68597760.

The previous prime is 85820759. The next prime is 85820789. The reversal of 85820785 is 58702858.

It can be written as a sum of positive squares in 4 ways, for example, as 3356224 + 82464561 = 1832^2 + 9081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85820785 - 2²³ = 77432177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85820789) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 336 + ... + 13105.

It is an arithmetic number, because the mean of its divisors is an integer number (12884157).

Almost surely, 2^85820785 is an apocalyptic number.

It is an amenable number.

85820785 is a deficient number, since it is larger than the sum of its proper divisors (17252471).

85820785 is a wasteful number, since it uses less digits than its factorization.

85820785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14723.

The product of its (nonzero) digits is 179200, while the sum is 43.

The square root of 85820785 is about 9263.9508310440. The cubic root of 85820785 is about 441.0936722020.

The spelling of 85820785 in words is "eighty-five million, eight hundred twenty thousand, seven hundred eighty-five".