85823812 has 6 divisors (see below), whose sum is σ = 150191678. Its totient is φ = 42911904.

The previous prime is 85823791. The next prime is 85823813. The reversal of 85823812 is 21832858.

It can be written as a sum of positive squares in only one way, i.e., 85821696 + 2116 = 9264^2 + 46^2 .

It is a super-2 number, since 2×85823812² = 14731453412422688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (85823813) by changing a digit.

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 as a sum of consecutive naturals, namely, 10727973 + ... + 10727980.

Almost surely, 2^85823812 is an apocalyptic number.

It is an amenable number.

85823812 is a deficient number, since it is larger than the sum of its proper divisors (64367866).

85823812 is a wasteful number, since it uses less digits than its factorization.

85823812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21455957 (or 21455955 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 85823812 is about 9264.1142048228. The cubic root of 85823812 is about 441.0988581052.

The spelling of 85823812 in words is "eighty-five million, eight hundred twenty-three thousand, eight hundred twelve".