85778120 has 32 divisors (see below), whose sum is σ = 197493120. Its totient is φ = 33512640.

The previous prime is 85778113. The next prime is 85778123. The reversal of 85778120 is 2187758.

It is not an unprimeable number, because it can be changed into a prime (85778123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23216 + ... + 26655.

It is an arithmetic number, because the mean of its divisors is an integer number (6171660).

Almost surely, 2^85778120 is an apocalyptic number.

It is an amenable number.

85778120 is an abundant number, since it is smaller than the sum of its proper divisors (111715000).

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

85778120 is a wasteful number, since it uses less digits than its factorization.

85778120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49925 (or 49921 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 85778120 is about 9261.6478015524. The cubic root of 85778120 is about 441.0205648889.

The spelling of 85778120 in words is "eighty-five million, seven hundred seventy-eight thousand, one hundred twenty".