8398439965 has 8 divisors (see below), whose sum is σ = 10081755648. Its totient is φ = 6716333520.

The previous prime is 8398439957. The next prime is 8398440007. The reversal of 8398439965 is 5699348938.

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

It is not a de Polignac number, because 8398439965 - 2³ = 8398439957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8398439897 and 8398439906.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286957 + ... + 314866.

It is an arithmetic number, because the mean of its divisors is an integer number (1260219456).

Almost surely, 2^8398439965 is an apocalyptic number.

It is an amenable number.

8398439965 is a deficient number, since it is larger than the sum of its proper divisors (1683315683).

8398439965 is a wasteful number, since it uses less digits than its factorization.

8398439965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604619.

The product of its digits is 50388480, while the sum is 64.

The square root of 8398439965 is about 91643.0028152723. The cubic root of 8398439965 is about 2032.6668634662. Note that the first 3 decimals are identical.

The spelling of 8398439965 in words is "eight billion, three hundred ninety-eight million, four hundred thirty-nine thousand, nine hundred sixty-five".