7928721430000 has 100 divisors (see below), whose sum is σ = 21938545855600. Its totient is φ = 2718418752000.

The previous prime is 7928721429977. The next prime is 7928721430001. The reversal of 7928721430000 is 341278297.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7928721430001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 56563725 + ... + 56703724.

It is an arithmetic number, because the mean of its divisors is an integer number (219385458556).

Almost surely, 2^{7928721430000} is an apocalyptic number.

7928721430000 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7928721430000 is an abundant number, since it is smaller than the sum of its proper divisors (14009824425600).

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

7928721430000 is a wasteful number, since it uses less digits than its factorization.

7928721430000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113267484 (or 113267463 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 7928721430000 in words is "seven trillion, nine hundred twenty-eight billion, seven hundred twenty-one million, four hundred thirty thousand".