39999999998 has 32 divisors (see below), whose sum is σ = 69637761984. Its totient is φ = 16878108672.

The previous prime is 39999999979. The next prime is 40000000003. The reversal of 39999999998 is 89999999993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185786 + ... + 338402.

It is an arithmetic number, because the mean of its divisors is an integer number (2176180062).

Almost surely, 2^39999999998 is an apocalyptic number.

39999999998 is a deficient number, since it is larger than the sum of its proper divisors (29637761986).

39999999998 is a wasteful number, since it uses less digits than its factorization.

39999999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152916.

The product of its digits is 9298091736, while the sum is 92.

It can be divided in two parts, 3 and 9999999998, that added together give a palindrome (10000000001).

The spelling of 39999999998 in words is "thirty-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".