8378394409 has 36 divisors (see below), whose sum is σ = 10750100592. Its totient is φ = 6505939440.

The previous prime is 8378394373. The next prime is 8378394433. The reversal of 8378394409 is 9044938738.

It is not a de Polignac number, because 8378394409 - 2⁷ = 8378394281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8378394409.

It is not an unprimeable number, because it can be changed into a prime (8378398409) 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 35 ways as a sum of consecutive naturals, for example, 1817902 + ... + 1822504.

Almost surely, 2^8378394409 is an apocalyptic number.

It is an amenable number.

8378394409 is a deficient number, since it is larger than the sum of its proper divisors (2371706183).

8378394409 is a wasteful number, since it uses less digits than its factorization.

8378394409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946 (or 4928 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 55.

The square root of 8378394409 is about 91533.5698473516. The cubic root of 8378394409 is about 2031.0483724770.

It can be divided in two parts, 837839 and 4409, that added together give a palindrome (842248).

The spelling of 8378394409 in words is "eight billion, three hundred seventy-eight million, three hundred ninety-four thousand, four hundred nine".