822812420 has 12 divisors (see below), whose sum is σ = 1727906124. Its totient is φ = 329124960.

The previous prime is 822812377. The next prime is 822812429. The reversal of 822812420 is 24218228.

It can be written as a sum of positive squares in 2 ways, for example, as 654643396 + 168169024 = 25586^2 + 12968^2 .

It is not an unprimeable number, because it can be changed into a prime (822812429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20570291 + ... + 20570330.

It is an arithmetic number, because the mean of its divisors is an integer number (143992177).

Almost surely, 2^822812420 is an apocalyptic number.

It is an amenable number.

822812420 is an abundant number, since it is smaller than the sum of its proper divisors (905093704).

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

822812420 is a wasteful number, since it uses less digits than its factorization.

822812420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41140630 (or 41140628 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 822812420 is about 28684.7070753738. The cubic root of 822812420 is about 937.0590215249.

The spelling of 822812420 in words is "eight hundred twenty-two million, eight hundred twelve thousand, four hundred twenty".