85080820 has 24 divisors (see below), whose sum is σ = 194912928. Its totient is φ = 30938400.

The previous prime is 85080811. The next prime is 85080829. The reversal of 85080820 is 2808058.

It is an interprime number because it is at equal distance from previous prime (85080811) and next prime (85080829).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85080829) 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, 193146 + ... + 193585.

It is an arithmetic number, because the mean of its divisors is an integer number (8121372).

Almost surely, 2^85080820 is an apocalyptic number.

It is an amenable number.

85080820 is an abundant number, since it is smaller than the sum of its proper divisors (109832108).

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

85080820 is a wasteful number, since it uses less digits than its factorization.

85080820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386751 (or 386749 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 85080820 is about 9223.9264958043. The cubic root of 85080820 is about 439.8222767091.

Adding to 85080820 its reverse (2808058), we get a palindrome (87888878).

The spelling of 85080820 in words is "eighty-five million, eighty thousand, eight hundred twenty".