823634864 has 40 divisors (see below), whose sum is σ = 1720275312. Its totient is φ = 379756800.

The previous prime is 823634863. The next prime is 823634881. The reversal of 823634864 is 468436328.

823634864 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (823634863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394367 + ... + 396449.

Almost surely, 2^823634864 is an apocalyptic number.

It is an amenable number.

823634864 is an abundant number, since it is smaller than the sum of its proper divisors (896640448).

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

823634864 is a wasteful number, since it uses less digits than its factorization.

823634864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4005 (or 3999 counting only the distinct ones).

The product of its digits is 663552, while the sum is 44.

The square root of 823634864 is about 28699.0394264338. The cubic root of 823634864 is about 937.3711307071.

The spelling of 823634864 in words is "eight hundred twenty-three million, six hundred thirty-four thousand, eight hundred sixty-four".