8440423378 has 32 divisors (see below), whose sum is σ = 13254237360. Its totient is φ = 4025978880.

The previous prime is 8440423361. The next prime is 8440423399. The reversal of 8440423378 is 8733240448.

It can be written as a sum of positive squares in 8 ways, for example, as 1078268569 + 7362154809 = 32837^2 + 85803^2 .

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5698398 + ... + 5699878.

Almost surely, 2^8440423378 is an apocalyptic number.

8440423378 is a deficient number, since it is larger than the sum of its proper divisors (4813813982).

8440423378 is a wasteful number, since it uses less digits than its factorization.

8440423378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2622.

The product of its (nonzero) digits is 516096, while the sum is 43.

The square root of 8440423378 is about 91871.7768305370. The cubic root of 8440423378 is about 2036.0483043710.

The spelling of 8440423378 in words is "eight billion, four hundred forty million, four hundred twenty-three thousand, three hundred seventy-eight".