85815812 has 12 divisors (see below), whose sum is σ = 155022336. Its totient is φ = 41523720.

The previous prime is 85815797. The next prime is 85815823. The reversal of 85815812 is 21851858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345908 + ... + 346155.

It is an arithmetic number, because the mean of its divisors is an integer number (12918528).

Almost surely, 2^85815812 is an apocalyptic number.

It is an amenable number.

85815812 is a deficient number, since it is larger than the sum of its proper divisors (69206524).

85815812 is a wasteful number, since it uses less digits than its factorization.

85815812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692098 (or 692096 counting only the distinct ones).

The product of its digits is 25600, while the sum is 38.

The square root of 85815812 is about 9263.6824211541. The cubic root of 85815812 is about 441.0851521168.

The spelling of 85815812 in words is "eighty-five million, eight hundred fifteen thousand, eight hundred twelve".