8463640838 has 8 divisors (see below), whose sum is σ = 12696233160. Its totient is φ = 4231563120.

The previous prime is 8463640831. The next prime is 8463640841. The reversal of 8463640838 is 8380463648.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×8463640838² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8463640831) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 84503 + ... + 155138.

It is an arithmetic number, because the mean of its divisors is an integer number (1587029145).

Almost surely, 2^8463640838 is an apocalyptic number.

8463640838 is a deficient number, since it is larger than the sum of its proper divisors (4232592322).

8463640838 is a wasteful number, since it uses less digits than its factorization.

8463640838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257302.

The product of its (nonzero) digits is 2654208, while the sum is 50.

The square root of 8463640838 is about 91998.0480119008. The cubic root of 8463640838 is about 2037.9134790495.

The spelling of 8463640838 in words is "eight billion, four hundred sixty-three million, six hundred forty thousand, eight hundred thirty-eight".