823745385 has 24 divisors (see below), whose sum is σ = 1441177920. Its totient is φ = 435222432.

The previous prime is 823745357. The next prime is 823745407. The reversal of 823745385 is 583547328.

823745385 is a `hidden beast` number, since 82 + 37 + 4 + 538 + 5 = 666.

823745385 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 823745385 - 2¹⁷ = 823614313 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 823745385.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80725 + ... + 90354.

It is an arithmetic number, because the mean of its divisors is an integer number (60049080).

Almost surely, 2^823745385 is an apocalyptic number.

It is an amenable number.

823745385 is a deficient number, since it is larger than the sum of its proper divisors (617432535).

823745385 is a wasteful number, since it uses less digits than its factorization.

823745385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171197 (or 171194 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 823745385 is about 28700.9648792510. The cubic root of 823745385 is about 937.4130564705.

The spelling of 823745385 in words is "eight hundred twenty-three million, seven hundred forty-five thousand, three hundred eighty-five".