85999810 has 32 divisors (see below), whose sum is σ = 168603120. Its totient is φ = 31392768.

The previous prime is 85999799. The next prime is 85999811. The reversal of 85999810 is 1899958.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 603729 + 85396081 = 777^2 + 9241^2 .

It is a super-2 number, since 2×85999810² = 14791934640072200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85999811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7854 + ... + 15286.

Almost surely, 2^85999810 is an apocalyptic number.

85999810 is a deficient number, since it is larger than the sum of its proper divisors (82603310).

85999810 is a wasteful number, since it uses less digits than its factorization.

85999810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7542.

The product of its (nonzero) digits is 233280, while the sum is 49.

The square root of 85999810 is about 9273.6082513766. The cubic root of 85999810 is about 441.4001711816.

The spelling of 85999810 in words is "eighty-five million, nine hundred ninety-nine thousand, eight hundred ten".