85812805 has 32 divisors (see below), whose sum is σ = 117669888. Its totient is φ = 59616000.

The previous prime is 85812799. The next prime is 85812829. The reversal of 85812805 is 50821858.

It is not a de Polignac number, because 85812805 - 2⁷ = 85812677 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

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 31 ways as a sum of consecutive naturals, for example, 73980 + ... + 75130.

It is an arithmetic number, because the mean of its divisors is an integer number (3677184).

Almost surely, 2^85812805 is an apocalyptic number.

It is an amenable number.

85812805 is a deficient number, since it is larger than the sum of its proper divisors (31857083).

85812805 is a wasteful number, since it uses less digits than its factorization.

85812805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1237.

The product of its (nonzero) digits is 25600, while the sum is 37.

The square root of 85812805 is about 9263.5201192635. The cubic root of 85812805 is about 441.0800001581.

The spelling of 85812805 in words is "eighty-five million, eight hundred twelve thousand, eight hundred five".