4399278685 has 8 divisors (see below), whose sum is σ = 5461173720. Its totient is φ = 3398063424.

The previous prime is 4399278671. The next prime is 4399278731. The reversal of 4399278685 is 5868729934.

It can be written as a sum of positive squares in 4 ways, for example, as 830650041 + 3568628644 = 28821^2 + 59738^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4399278685 - 2¹³ = 4399270493 is a prime.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 15169782 + ... + 15170071.

It is an arithmetic number, because the mean of its divisors is an integer number (682646715).

Almost surely, 2^4399278685 is an apocalyptic number.

It is an amenable number.

4399278685 is a deficient number, since it is larger than the sum of its proper divisors (1061895035).

4399278685 is a wasteful number, since it uses less digits than its factorization.

4399278685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30339887.

The product of its digits is 26127360, while the sum is 61.

The square root of 4399278685 is about 66327.0584678681. The cubic root of 4399278685 is about 1638.5529925619.

The spelling of 4399278685 in words is "four billion, three hundred ninety-nine million, two hundred seventy-eight thousand, six hundred eighty-five".