3999223618 has 16 divisors (see below), whose sum is σ = 6461453376. Its totient is φ = 1845461520.

The previous prime is 3999223559. The next prime is 3999223619. The reversal of 3999223618 is 8163229993.

It is not an unprimeable number, because it can be changed into a prime (3999223619) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 187563 + ... + 207793.

It is an arithmetic number, because the mean of its divisors is an integer number (403840836).

Almost surely, 2^3999223618 is an apocalyptic number.

3999223618 is a deficient number, since it is larger than the sum of its proper divisors (2462229758).

3999223618 is a wasteful number, since it uses less digits than its factorization.

3999223618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27849.

The product of its digits is 1259712, while the sum is 52.

The square root of 3999223618 is about 63239.4150668711. The cubic root of 3999223618 is about 1587.2983428558.

The spelling of 3999223618 in words is "three billion, nine hundred ninety-nine million, two hundred twenty-three thousand, six hundred eighteen".