822420408 has 64 divisors (see below), whose sum is σ = 2109888000. Its totient is φ = 267143520.

The previous prime is 822420343. The next prime is 822420413. The reversal of 822420408 is 804024228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1907953 + ... + 1908383.

It is an arithmetic number, because the mean of its divisors is an integer number (32967000).

Almost surely, 2^822420408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 822420408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054944000).

822420408 is an abundant number, since it is smaller than the sum of its proper divisors (1287467592).

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

822420408 is an equidigital number, since it uses as much as digits as its factorization.

822420408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569 (or 479 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 822420408 is about 28677.8731428954. The cubic root of 822420408 is about 936.9101837402.

The spelling of 822420408 in words is "eight hundred twenty-two million, four hundred twenty thousand, four hundred eight".