39856213420 has 12 divisors (see below), whose sum is σ = 83698048224. Its totient is φ = 15942485360.

The previous prime is 39856213391. The next prime is 39856213429. The reversal of 39856213420 is 2431265893.

It is not an unprimeable number, because it can be changed into a prime (39856213429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 996405316 + ... + 996405355.

It is an arithmetic number, because the mean of its divisors is an integer number (6974837352).

Almost surely, 2^39856213420 is an apocalyptic number.

It is an amenable number.

39856213420 is an abundant number, since it is smaller than the sum of its proper divisors (43841834804).

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

39856213420 is a wasteful number, since it uses less digits than its factorization.

39856213420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992810680 (or 1992810678 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 39856213420 in words is "thirty-nine billion, eight hundred fifty-six million, two hundred thirteen thousand, four hundred twenty".