39199720000 has 140 divisors (see below), whose sum is σ = 111089440000. Its totient is φ = 13439808000.

The previous prime is 39199719997. The next prime is 39199720013. The reversal of 39199720000 is 2799193.

It is a tau number, because it is divible by the number of its divisors (140).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 210001 + ... + 349999.

It is an arithmetic number, because the mean of its divisors is an integer number (793496000).

Almost surely, 2^39199720000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39199720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55544720000).

39199720000 is an abundant number, since it is smaller than the sum of its proper divisors (71889720000).

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

39199720000 is an equidigital number, since it uses as much as digits as its factorization.

39199720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140038 (or 140013 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 40.

The spelling of 39199720000 in words is "thirty-nine billion, one hundred ninety-nine million, seven hundred twenty thousand".