39893640680 has 16 divisors (see below), whose sum is σ = 89760691620. Its totient is φ = 15957456256.

The previous prime is 39893640637. The next prime is 39893640697. The reversal of 39893640680 is 8604639893.

It can be written as a sum of positive squares in 2 ways, for example, as 33461921476 + 6431719204 = 182926^2 + 80198^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 498670469 + ... + 498670548.

Almost surely, 2^39893640680 is an apocalyptic number.

It is an amenable number.

39893640680 is an abundant number, since it is smaller than the sum of its proper divisors (49867050940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39893640680 is a wasteful number, since it uses less digits than its factorization.

39893640680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997341028 (or 997341024 counting only the distinct ones).

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 39893640680 in words is "thirty-nine billion, eight hundred ninety-three million, six hundred forty thousand, six hundred eighty".