85681812 has 24 divisors (see below), whose sum is σ = 200491200. Its totient is φ = 28479616.

The previous prime is 85681807. The next prime is 85681823. The reversal of 85681812 is 21818658.

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 7 ways as a sum of consecutive naturals, for example, 5637 + ... + 14252.

It is an arithmetic number, because the mean of its divisors is an integer number (8353800).

Almost surely, 2^85681812 is an apocalyptic number.

It is an amenable number.

85681812 is an abundant number, since it is smaller than the sum of its proper divisors (114809388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85681812 is a wasteful number, since it uses less digits than its factorization.

85681812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20255 (or 20253 counting only the distinct ones).

The product of its digits is 30720, while the sum is 39.

The square root of 85681812 is about 9256.4470505697. The cubic root of 85681812 is about 440.8554500771.

The spelling of 85681812 in words is "eighty-five million, six hundred eighty-one thousand, eight hundred twelve".