4378809906 has 24 divisors (see below), whose sum is σ = 9521682924. Its totient is φ = 1454332320.

The previous prime is 4378809859. The next prime is 4378809917. The reversal of 4378809906 is 6099088734.

It can be written as a sum of positive squares in 2 ways, for example, as 4219671681 + 159138225 = 64959^2 + 12615^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 434125 + ... + 444096.

Almost surely, 2^4378809906 is an apocalyptic number.

4378809906 is an abundant number, since it is smaller than the sum of its proper divisors (5142873018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4378809906 is a wasteful number, since it uses less digits than its factorization.

4378809906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878506 (or 878503 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 4378809906 is about 66172.5766915571. The cubic root of 4378809906 is about 1636.0077775449.

The spelling of 4378809906 in words is "four billion, three hundred seventy-eight million, eight hundred nine thousand, nine hundred six".