822765140 has 24 divisors (see below), whose sum is σ = 1731574152. Its totient is φ = 328388480.

The previous prime is 822765121. The next prime is 822765143. The reversal of 822765140 is 41567228.

It can be written as a sum of positive squares in 4 ways, for example, as 36747844 + 786017296 = 6062^2 + 28036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 822765140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822765143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35399 + ... + 53838.

It is an arithmetic number, because the mean of its divisors is an integer number (72148923).

Almost surely, 2^822765140 is an apocalyptic number.

It is an amenable number.

822765140 is an abundant number, since it is smaller than the sum of its proper divisors (908809012).

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

822765140 is a wasteful number, since it uses less digits than its factorization.

822765140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89707 (or 89705 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 822765140 is about 28683.8829310120. The cubic root of 822765140 is about 937.0410729224.

The spelling of 822765140 in words is "eight hundred twenty-two million, seven hundred sixty-five thousand, one hundred forty".