823043385 has 24 divisors (see below), whose sum is σ = 1488636864. Its totient is φ = 419870880.

The previous prime is 823043357. The next prime is 823043393. The reversal of 823043385 is 583340328.

823043385 is a `hidden beast` number, since 8 + 230 + 43 + 385 = 666.

It is not a de Polignac number, because 823043385 - 2⁹ = 823042873 is a prime.

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, 396571 + ... + 398640.

It is an arithmetic number, because the mean of its divisors is an integer number (62026536).

Almost surely, 2^823043385 is an apocalyptic number.

It is an amenable number.

823043385 is a deficient number, since it is larger than the sum of its proper divisors (665593479).

823043385 is a wasteful number, since it uses less digits than its factorization.

823043385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795245 (or 795242 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 823043385 is about 28688.7327186127. The cubic root of 823043385 is about 937.1466914013.

It can be divided in two parts, 8230 and 43385, that added together give a palindrome (51615).

The spelling of 823043385 in words is "eight hundred twenty-three million, forty-three thousand, three hundred eighty-five".