4394251918 has 16 divisors (see below), whose sum is σ = 7628359680. Its totient is φ = 1859411736.

The previous prime is 4394251909. The next prime is 4394252033. The reversal of 4394251918 is 8191524934.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1985446 + ... + 1987657.

It is an arithmetic number, because the mean of its divisors is an integer number (476772480).

Almost surely, 2^4394251918 is an apocalyptic number.

4394251918 is a deficient number, since it is larger than the sum of its proper divisors (3234107762).

4394251918 is a wasteful number, since it uses less digits than its factorization.

4394251918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973191.

The product of its digits is 311040, while the sum is 46.

The square root of 4394251918 is about 66289.1538488764. The cubic root of 4394251918 is about 1637.9286657238.

The spelling of 4394251918 in words is "four billion, three hundred ninety-four million, two hundred fifty-one thousand, nine hundred eighteen".