85855844 has 6 divisors (see below), whose sum is σ = 150247734. Its totient is φ = 42927920.

The previous prime is 85855843. The next prime is 85855883. The reversal of 85855844 is 44855858.

It can be written as a sum of positive squares in only one way, i.e., 44382244 + 41473600 = 6662^2 + 6440^2 .

It is not an unprimeable number, because it can be changed into a prime (85855843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10731977 + ... + 10731984.

It is an arithmetic number, because the mean of its divisors is an integer number (25041289).

Almost surely, 2^85855844 is an apocalyptic number.

It is an amenable number.

85855844 is a deficient number, since it is larger than the sum of its proper divisors (64391890).

85855844 is a wasteful number, since it uses less digits than its factorization.

85855844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21463965 (or 21463963 counting only the distinct ones).

The product of its digits is 1024000, while the sum is 47.

The square root of 85855844 is about 9265.8428650609. The cubic root of 85855844 is about 441.1537283517.

The spelling of 85855844 in words is "eighty-five million, eight hundred fifty-five thousand, eight hundred forty-four".