39335978889 has 15 divisors (see below), whose sum is σ = 58763820247. Its totient is φ = 26222795928.

The previous prime is 39335978881. The next prime is 39335978917. The reversal of 39335978889 is 98887953393.

It is a happy number.

The square root of 39335978889 is 198333.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4251692025 + 35084286864 = 65205^2 + 187308^2 .

It is not a de Polignac number, because 39335978889 - 2³ = 39335978881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39335978881) 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 in 14 ways as a sum of consecutive naturals, for example, 1773979 + ... + 1796015.

Almost surely, 2^39335978889 is an apocalyptic number.

39335978889 is the 198333-rd square number.

39335978889 is the 99167-th centered octagonal number.

It is an amenable number.

39335978889 is a deficient number, since it is larger than the sum of its proper divisors (19427841358).

39335978889 is an frugal number, since it uses more digits than its factorization.

39335978889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44086 (or 22040 counting only the distinct ones).

The product of its digits is 352719360, while the sum is 72.

The spelling of 39335978889 in words is "thirty-nine billion, three hundred thirty-five million, nine hundred seventy-eight thousand, eight hundred eighty-nine".