823993854 has 32 divisors (see below), whose sum is σ = 1668692256. Its totient is φ = 271226880.

The previous prime is 823993829. The next prime is 823993861. The reversal of 823993854 is 458399328.

It is a junction number, because it is equal to n+sod(n) for n = 823993797 and 823993806.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 313554 + ... + 316170.

It is an arithmetic number, because the mean of its divisors is an integer number (52146633).

Almost surely, 2^823993854 is an apocalyptic number.

823993854 is an abundant number, since it is smaller than the sum of its proper divisors (844698402).

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

823993854 is a wasteful number, since it uses less digits than its factorization.

823993854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3260.

The product of its digits is 1866240, while the sum is 51.

The square root of 823993854 is about 28705.2931355874. The cubic root of 823993854 is about 937.5072986454.

The spelling of 823993854 in words is "eight hundred twenty-three million, nine hundred ninety-three thousand, eight hundred fifty-four".