822447440 has 20 divisors (see below), whose sum is σ = 1912190484. Its totient is φ = 328978944.

The previous prime is 822447421. The next prime is 822447443. The reversal of 822447440 is 44744228.

It can be written as a sum of positive squares in 2 ways, for example, as 476636224 + 345811216 = 21832^2 + 18596^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 822447440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822447443) 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 3 ways as a sum of consecutive naturals, for example, 5140217 + ... + 5140376.

Almost surely, 2^822447440 is an apocalyptic number.

822447440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

822447440 is an abundant number, since it is smaller than the sum of its proper divisors (1089743044).

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

822447440 is a wasteful number, since it uses less digits than its factorization.

822447440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10280606 (or 10280600 counting only the distinct ones).

The product of its (nonzero) digits is 57344, while the sum is 35.

The square root of 822447440 is about 28678.3444431508. The cubic root of 822447440 is about 936.9204486762.

The spelling of 822447440 in words is "eight hundred twenty-two million, four hundred forty-seven thousand, four hundred forty".