39945597720 has 192 divisors, whose sum is σ = 146739340800. Its totient is φ = 8649849600.

The previous prime is 39945597689. The next prime is 39945597761. The reversal of 39945597720 is 2779554993.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 67056 + ... + 290495.

It is an arithmetic number, because the mean of its divisors is an integer number (764267400).

Almost surely, 2^39945597720 is an apocalyptic number.

39945597720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39945597720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73369670400).

39945597720 is an abundant number, since it is smaller than the sum of its proper divisors (106793743080).

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

39945597720 is a wasteful number, since it uses less digits than its factorization.

39945597720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357598 (or 357587 counting only the distinct ones).

The product of its (nonzero) digits is 21432600, while the sum is 60.

The spelling of 39945597720 in words is "thirty-nine billion, nine hundred forty-five million, five hundred ninety-seven thousand, seven hundred twenty".