85118820 has 48 divisors (see below), whose sum is σ = 239160768. Its totient is φ = 22619520.

The previous prime is 85118809. The next prime is 85118827. The reversal of 85118820 is 2881158.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (85118827) 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 15 ways as a sum of consecutive naturals, for example, 16110 + ... + 20730.

It is an arithmetic number, because the mean of its divisors is an integer number (4982516).

Almost surely, 2^85118820 is an apocalyptic number.

It is an amenable number.

85118820 is an abundant number, since it is smaller than the sum of its proper divisors (154041948).

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

85118820 is a wasteful number, since it uses less digits than its factorization.

85118820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4940 (or 4938 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 85118820 is about 9225.9861261548. The cubic root of 85118820 is about 439.8877468464.

Adding to 85118820 its reverse (2881158), we get a palindrome (87999978).

The spelling of 85118820 in words is "eighty-five million, one hundred eighteen thousand, eight hundred twenty".