85639798 has 16 divisors (see below), whose sum is σ = 131135760. Its totient is φ = 41933536.

The previous prime is 85639777. The next prime is 85639811. The reversal of 85639798 is 89793658.

It is a happy number.

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 7 ways as a sum of consecutive naturals, for example, 33336 + ... + 35812.

It is an arithmetic number, because the mean of its divisors is an integer number (8195985).

Almost surely, 2^85639798 is an apocalyptic number.

85639798 is a deficient number, since it is larger than the sum of its proper divisors (45495962).

85639798 is a wasteful number, since it uses less digits than its factorization.

85639798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2831.

The product of its digits is 3265920, while the sum is 55.

The square root of 85639798 is about 9254.1773270237. The cubic root of 85639798 is about 440.7833806040.

The spelling of 85639798 in words is "eighty-five million, six hundred thirty-nine thousand, seven hundred ninety-eight".