85391828 has 6 divisors (see below), whose sum is σ = 149435706. Its totient is φ = 42695912.

The previous prime is 85391791. The next prime is 85391837. The reversal of 85391828 is 82819358.

It can be written as a sum of positive squares in only one way, i.e., 80604484 + 4787344 = 8978^2 + 2188^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10673975 + ... + 10673982.

It is an arithmetic number, because the mean of its divisors is an integer number (24905951).

Almost surely, 2^85391828 is an apocalyptic number.

It is an amenable number.

85391828 is a deficient number, since it is larger than the sum of its proper divisors (64043878).

85391828 is a wasteful number, since it uses less digits than its factorization.

85391828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21347961 (or 21347959 counting only the distinct ones).

The product of its digits is 138240, while the sum is 44.

The square root of 85391828 is about 9240.7698813465. The cubic root of 85391828 is about 440.3575399661.

The spelling of 85391828 in words is "eighty-five million, three hundred ninety-one thousand, eight hundred twenty-eight".