822445785 has 64 divisors (see below), whose sum is σ = 1702632960. Its totient is φ = 368858880.

The previous prime is 822445769. The next prime is 822445801. The reversal of 822445785 is 587544228.

It is an interprime number because it is at equal distance from previous prime (822445769) and next prime (822445801).

It is not a de Polignac number, because 822445785 - 2⁴ = 822445769 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 822445785.

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 63 ways as a sum of consecutive naturals, for example, 41875 + ... + 58295.

It is an arithmetic number, because the mean of its divisors is an integer number (26603640).

Almost surely, 2^822445785 is an apocalyptic number.

It is an amenable number.

822445785 is an abundant number, since it is smaller than the sum of its proper divisors (880187175).

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

822445785 is a wasteful number, since it uses less digits than its factorization.

822445785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16495 (or 16489 counting only the distinct ones).

The product of its digits is 716800, while the sum is 45.

The square root of 822445785 is about 28678.3155886115. The cubic root of 822445785 is about 936.9198202249.

The spelling of 822445785 in words is "eight hundred twenty-two million, four hundred forty-five thousand, seven hundred eighty-five".