822679440 has 160 divisors (see below), whose sum is σ = 2847246336. Its totient is φ = 194772480.

The previous prime is 822679427. The next prime is 822679447. The reversal of 822679440 is 44976228.

It is a junction number, because it is equal to n+sod(n) for n = 822679392 and 822679401.

It is not an unprimeable number, because it can be changed into a prime (822679447) 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 31 ways as a sum of consecutive naturals, for example, 109897 + ... + 117143.

Almost surely, 2^822679440 is an apocalyptic number.

822679440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 822679440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1423623168).

822679440 is an abundant number, since it is smaller than the sum of its proper divisors (2024566896).

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

822679440 is a wasteful number, since it uses less digits than its factorization.

822679440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7317 (or 7311 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 42.

The square root of 822679440 is about 28682.3890218371. The cubic root of 822679440 is about 937.0085374294.

The spelling of 822679440 in words is "eight hundred twenty-two million, six hundred seventy-nine thousand, four hundred forty".