85118420 has 12 divisors (see below), whose sum is σ = 178748724. Its totient is φ = 34047360.

The previous prime is 85118413. The next prime is 85118441. The reversal of 85118420 is 2481158.

It can be written as a sum of positive squares in 2 ways, for example, as 64288324 + 20830096 = 8018^2 + 4564^2 .

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 3 ways as a sum of consecutive naturals, for example, 2127941 + ... + 2127980.

It is an arithmetic number, because the mean of its divisors is an integer number (14895727).

Almost surely, 2^85118420 is an apocalyptic number.

It is an amenable number.

85118420 is an abundant number, since it is smaller than the sum of its proper divisors (93630304).

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

85118420 is a wasteful number, since it uses less digits than its factorization.

85118420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4255930 (or 4255928 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 85118420 is about 9225.9644482298. The cubic root of 85118420 is about 439.8870577886.

Adding to 85118420 its reverse (2481158), we get a palindrome (87599578).

The spelling of 85118420 in words is "eighty-five million, one hundred eighteen thousand, four hundred twenty".