3999999998 has 8 divisors (see below), whose sum is σ = 6193548480. Its totient is φ = 1935483840.

The previous prime is 3999999979. The next prime is 4000000007. The reversal of 3999999998 is 8999999993.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32258003 + ... + 32258126.

It is an arithmetic number, because the mean of its divisors is an integer number (774193560).

Almost surely, 2^3999999998 is an apocalyptic number.

3999999998 is a deficient number, since it is larger than the sum of its proper divisors (2193548482).

3999999998 is a wasteful number, since it uses less digits than its factorization.

3999999998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64516162.

The product of its digits is 1033121304, while the sum is 83.

The square root of 3999999998 is about 63245.5531875562. The cubic root of 3999999998 is about 1587.4010517036.

It can be divided in two parts, 3 and 999999998, that added together give a palindrome (1000000001).

The spelling of 3999999998 in words is "three billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".