85775538 has 32 divisors (see below), whose sum is σ = 181621440. Its totient is φ = 26930880.

The previous prime is 85775483. The next prime is 85775539. The reversal of 85775538 is 83557758.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85775539) 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, 18556 + ... + 22712.

It is an arithmetic number, because the mean of its divisors is an integer number (5675670).

Almost surely, 2^85775538 is an apocalyptic number.

85775538 is an abundant number, since it is smaller than the sum of its proper divisors (95845902).

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

85775538 is a wasteful number, since it uses less digits than its factorization.

85775538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4362.

The product of its digits is 1176000, while the sum is 48.

The square root of 85775538 is about 9261.5084084613. The cubic root of 85775538 is about 441.0161398035.

The spelling of 85775538 in words is "eighty-five million, seven hundred seventy-five thousand, five hundred thirty-eight".