823345560 has 80 divisors (see below), whose sum is σ = 2767366800. Its totient is φ = 219557952.

The previous prime is 823345519. The next prime is 823345591. The reversal of 823345560 is 65543328.

It is a happy number.

It is a super-2 number, since 2×823345560² = 1355795822343427200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 123820 + ... + 130299.

It is an arithmetic number, because the mean of its divisors is an integer number (34592085).

Almost surely, 2^823345560 is an apocalyptic number.

It is an amenable number.

823345560 is an abundant number, since it is smaller than the sum of its proper divisors (1944021240).

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

823345560 is a wasteful number, since it uses less digits than its factorization.

823345560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254142 (or 254129 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 823345560 is about 28693.9986756813. The cubic root of 823345560 is about 937.2613664628.

Adding to 823345560 its reverse (65543328), we get a palindrome (888888888).

The spelling of 823345560 in words is "eight hundred twenty-three million, three hundred forty-five thousand, five hundred sixty".