3999998918 has 16 divisors (see below), whose sum is σ = 6360703200. Its totient is φ = 1880052096.

The previous prime is 3999998917. The next prime is 3999998927. The reversal of 3999998918 is 8198999993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999998917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43493 + ... + 99456.

It is an arithmetic number, because the mean of its divisors is an integer number (397543950).

Almost surely, 2^3999998918 is an apocalyptic number.

3999998918 is a deficient number, since it is larger than the sum of its proper divisors (2360704282).

3999998918 is a wasteful number, since it uses less digits than its factorization.

3999998918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143791.

The product of its digits is 102036672, while the sum is 74.

The square root of 3999998918 is about 63245.5446494059. The cubic root of 3999998918 is about 1587.4009088375.

The spelling of 3999998918 in words is "three billion, nine hundred ninety-nine million, nine hundred ninety-eight thousand, nine hundred eighteen".