823538656 has 24 divisors (see below), whose sum is σ = 1644182064. Its totient is φ = 405968640.

The previous prime is 823538609. The next prime is 823538657. The reversal of 823538656 is 656835328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823538657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178965 + ... + 183508.

It is an arithmetic number, because the mean of its divisors is an integer number (68507586).

Almost surely, 2^823538656 is an apocalyptic number.

It is an amenable number.

823538656 is a deficient number, since it is larger than the sum of its proper divisors (820643408).

823538656 is a wasteful number, since it uses less digits than its factorization.

823538656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362554 (or 362546 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 46.

The square root of 823538656 is about 28697.3632238225. The cubic root of 823538656 is about 937.3346314778.

The spelling of 823538656 in words is "eight hundred twenty-three million, five hundred thirty-eight thousand, six hundred fifty-six".