140020556928 has 128 divisors (see below), whose sum is σ = 425939205120. Its totient is φ = 39923352576.

The previous prime is 140020556891. The next prime is 140020556939. The reversal of 140020556928 is 829655020041.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 140020556928.

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 15 ways as a sum of consecutive naturals, for example, 1255575 + ... + 1362537.

It is an arithmetic number, because the mean of its divisors is an integer number (3327650040).

Almost surely, 2^140020556928 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 140020556928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212969602560).

140020556928 is an abundant number, since it is smaller than the sum of its proper divisors (285918648192).

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

140020556928 is a wasteful number, since it uses less digits than its factorization.

140020556928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107474 (or 107462 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 42.

Adding to 140020556928 its reverse (829655020041), we get a palindrome (969675576969).

The spelling of 140020556928 in words is "one hundred forty billion, twenty million, five hundred fifty-six thousand, nine hundred twenty-eight".