85780120 has 16 divisors (see below), whose sum is σ = 193005360. Its totient is φ = 34312032.

The previous prime is 85780109. The next prime is 85780153. The reversal of 85780120 is 2108758.

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, 1072212 + ... + 1072291.

It is an arithmetic number, because the mean of its divisors is an integer number (12062835).

Almost surely, 2^85780120 is an apocalyptic number.

It is an amenable number.

85780120 is an abundant number, since it is smaller than the sum of its proper divisors (107225240).

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

85780120 is a wasteful number, since it uses less digits than its factorization.

85780120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144514 (or 2144510 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 85780120 is about 9261.7557730702. The cubic root of 85780120 is about 441.0239924696.

Adding to 85780120 its reverse (2108758), we get a palindrome (87888878).

The spelling of 85780120 in words is "eighty-five million, seven hundred eighty thousand, one hundred twenty".