823020912 has 200 divisors, whose sum is σ = 2740690656. Its totient is φ = 233570304.

The previous prime is 823020911. The next prime is 823020931. The reversal of 823020912 is 219020328.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823020911) 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 39 ways as a sum of consecutive naturals, for example, 2331328 + ... + 2331680.

Almost surely, 2^823020912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 823020912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370345328).

823020912 is an abundant number, since it is smaller than the sum of its proper divisors (1917669744).

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

823020912 is a wasteful number, since it uses less digits than its factorization.

823020912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 823020912 is about 28688.3410464948. The cubic root of 823020912 is about 937.1381618026.

The spelling of 823020912 in words is "eight hundred twenty-three million, twenty thousand, nine hundred twelve".