8405638339 has 8 divisors (see below), whose sum is σ = 9634952288. Its totient is φ = 7183451520.

The previous prime is 8405638327. The next prime is 8405638357. The reversal of 8405638339 is 9338365048.

It is a happy number.

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

It is not a de Polignac number, because 8405638339 - 2¹⁷ = 8405507267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8405638292 and 8405638301.

It is not an unprimeable number, because it can be changed into a prime (8405638369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1779252 + ... + 1783969.

It is an arithmetic number, because the mean of its divisors is an integer number (1204369036).

Almost surely, 2^8405638339 is an apocalyptic number.

8405638339 is a deficient number, since it is larger than the sum of its proper divisors (1229313949).

8405638339 is a wasteful number, since it uses less digits than its factorization.

8405638339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563565.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The square root of 8405638339 is about 91682.2684001656. The cubic root of 8405638339 is about 2033.2474362860.

The spelling of 8405638339 in words is "eight billion, four hundred five million, six hundred thirty-eight thousand, three hundred thirty-nine".