39924578068 has 6 divisors (see below), whose sum is σ = 69868011626. Its totient is φ = 19962289032.

The previous prime is 39924578063. The next prime is 39924578093. The reversal of 39924578068 is 86087542993.

It can be written as a sum of positive squares in only one way, i.e., 34351656964 + 5572921104 = 185342^2 + 74652^2 .

It is a super-2 number, since 2×39924578068² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 39924577997 and 39924578015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39924578063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4990572255 + ... + 4990572262.

Almost surely, 2^39924578068 is an apocalyptic number.

It is an amenable number.

39924578068 is a deficient number, since it is larger than the sum of its proper divisors (29943433558).

39924578068 is a wasteful number, since it uses less digits than its factorization.

39924578068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9981144521 (or 9981144519 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 61.

The spelling of 39924578068 in words is "thirty-nine billion, nine hundred twenty-four million, five hundred seventy-eight thousand, sixty-eight".