85816838 has 16 divisors (see below), whose sum is σ = 132706944. Its totient is φ = 41590080.

The previous prime is 85816837. The next prime is 85816847. The reversal of 85816838 is 83861858.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 85816792 and 85816801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85816837) 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, 18731 + ... + 22857.

It is an arithmetic number, because the mean of its divisors is an integer number (8294184).

Almost surely, 2^85816838 is an apocalyptic number.

85816838 is a deficient number, since it is larger than the sum of its proper divisors (46890106).

85816838 is a wasteful number, since it uses less digits than its factorization.

85816838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4447.

The product of its digits is 368640, while the sum is 47.

The square root of 85816838 is about 9263.7377985347. The cubic root of 85816838 is about 441.0869099574.

The spelling of 85816838 in words is "eighty-five million, eight hundred sixteen thousand, eight hundred thirty-eight".