8398640605 has 8 divisors (see below), whose sum is σ = 10080864000. Its totient is φ = 6717248976.

The previous prime is 8398640597. The next prime is 8398640609. The reversal of 8398640605 is 5060468938.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8398640605 - 2³ = 8398640597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8398640609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185505 + ... + 226294.

It is an arithmetic number, because the mean of its divisors is an integer number (1260108000).

Almost surely, 2^8398640605 is an apocalyptic number.

It is an amenable number.

8398640605 is a deficient number, since it is larger than the sum of its proper divisors (1682223395).

8398640605 is a wasteful number, since it uses less digits than its factorization.

8398640605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415883.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 8398640605 is about 91644.0974913278. The cubic root of 8398640605 is about 2032.6830502435.

The spelling of 8398640605 in words is "eight billion, three hundred ninety-eight million, six hundred forty thousand, six hundred five".