39994239999 has 16 divisors (see below), whose sum is σ = 60949827072. Its totient is φ = 22851517728.

The previous prime is 39994239991. The next prime is 39994240003. The reversal of 39994239999 is 99993249993.

It is not a de Polignac number, because 39994239999 - 2³ = 39994239991 is a prime.

It is a super-2 number, since 2×39994239999² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 39994239999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39994239991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125137 + ... + 309269.

It is an arithmetic number, because the mean of its divisors is an integer number (3809364192).

Almost surely, 2^39994239999 is an apocalyptic number.

39994239999 is a deficient number, since it is larger than the sum of its proper divisors (20955587073).

39994239999 is a wasteful number, since it uses less digits than its factorization.

39994239999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194486.

The product of its digits is 344373768, while the sum is 75.

The spelling of 39994239999 in words is "thirty-nine billion, nine hundred ninety-four million, two hundred thirty-nine thousand, nine hundred ninety-nine".