823285386 has 192 divisors, whose sum is σ = 2305105920. Its totient is φ = 206219520.

The previous prime is 823285381. The next prime is 823285423. The reversal of 823285386 is 683582328.

823285386 is a `hidden beast` number, since 82 + 32 + 8 + 538 + 6 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (823285381) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7993011 + ... + 7993113.

It is an arithmetic number, because the mean of its divisors is an integer number (12005760).

Almost surely, 2^823285386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 823285386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152552960).

823285386 is an abundant number, since it is smaller than the sum of its proper divisors (1481820534).

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

823285386 is a wasteful number, since it uses less digits than its factorization.

823285386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 278 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 823285386 is about 28692.9501097395. The cubic root of 823285386 is about 937.2385327373.

The spelling of 823285386 in words is "eight hundred twenty-three million, two hundred eighty-five thousand, three hundred eighty-six".