823390668 has 18 divisors (see below), whose sum is σ = 2081348724. Its totient is φ = 274463544.

The previous prime is 823390663. The next prime is 823390681. The reversal of 823390668 is 866093328.

823390668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (823390663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11435946 + ... + 11436017.

Almost surely, 2^823390668 is an apocalyptic number.

It is an amenable number.

823390668 is an abundant number, since it is smaller than the sum of its proper divisors (1257958056).

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

823390668 is a wasteful number, since it uses less digits than its factorization.

823390668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22871973 (or 22871968 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 823390668 is about 28694.7846829350. The cubic root of 823390668 is about 937.2784824894.

The spelling of 823390668 in words is "eight hundred twenty-three million, three hundred ninety thousand, six hundred sixty-eight".