85577798 has 4 divisors (see below), whose sum is σ = 128366700. Its totient is φ = 42788898.

The previous prime is 85577749. The next prime is 85577801. The reversal of 85577798 is 89777558.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21394448 + ... + 21394451.

It is an arithmetic number, because the mean of its divisors is an integer number (32091675).

Almost surely, 2^85577798 is an apocalyptic number.

85577798 is a deficient number, since it is larger than the sum of its proper divisors (42788902).

85577798 is a wasteful number, since it uses less digits than its factorization.

85577798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42788901.

The product of its digits is 4939200, while the sum is 56.

The square root of 85577798 is about 9250.8268819603. The cubic root of 85577798 is about 440.6769847155.

The spelling of 85577798 in words is "eighty-five million, five hundred seventy-seven thousand, seven hundred ninety-eight".