822642085 has 8 divisors (see below), whose sum is σ = 989371800. Its totient is φ = 656646144.

The previous prime is 822642083. The next prime is 822642091. The reversal of 822642085 is 580246228.

It can be written as a sum of positive squares in 4 ways, for example, as 132319009 + 690323076 = 11503^2 + 26274^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 822642085 - 2¹ = 822642083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822642083) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 180972 + ... + 185461.

It is an arithmetic number, because the mean of its divisors is an integer number (123671475).

Almost surely, 2^822642085 is an apocalyptic number.

It is an amenable number.

822642085 is a deficient number, since it is larger than the sum of its proper divisors (166729715).

822642085 is a wasteful number, since it uses less digits than its factorization.

822642085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366887.

The product of its (nonzero) digits is 61440, while the sum is 37.

The square root of 822642085 is about 28681.7378308916. The cubic root of 822642085 is about 936.9943551198.

The spelling of 822642085 in words is "eight hundred twenty-two million, six hundred forty-two thousand, eighty-five".