823861863 has 48 divisors (see below), whose sum is σ = 1362816000. Its totient is φ = 474724800.

The previous prime is 823861853. The next prime is 823861891. The reversal of 823861863 is 368168328.

823861863 is a `hidden beast` number, since 8 + 23 + 8 + 618 + 6 + 3 = 666.

It is not a de Polignac number, because 823861863 - 2⁴ = 823861847 is a prime.

It is a super-3 number, since 3×823861863³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823861853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 411138 + ... + 413136.

It is an arithmetic number, because the mean of its divisors is an integer number (28392000).

Almost surely, 2^823861863 is an apocalyptic number.

823861863 is a deficient number, since it is larger than the sum of its proper divisors (538954137).

823861863 is a wasteful number, since it uses less digits than its factorization.

823861863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2220 (or 2217 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 823861863 is about 28702.9939727548. The cubic root of 823861863 is about 937.4572379429.

The spelling of 823861863 in words is "eight hundred twenty-three million, eight hundred sixty-one thousand, eight hundred sixty-three".