72793520728 has 32 divisors (see below), whose sum is σ = 142285691520. Its totient is φ = 34873920000.

The previous prime is 72793520677. The next prime is 72793520729. The reversal of 72793520728 is 82702539727.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72793520729) 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 7 ways as a sum of consecutive naturals, for example, 1428033 + ... + 1478128.

It is an arithmetic number, because the mean of its divisors is an integer number (4446427860).

Almost surely, 2^72793520728 is an apocalyptic number.

It is an amenable number.

72793520728 is a deficient number, since it is larger than the sum of its proper divisors (69492170792).

72793520728 is a wasteful number, since it uses less digits than its factorization.

72793520728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906299 (or 2906295 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 72793520728 in words is "seventy-two billion, seven hundred ninety-three million, five hundred twenty thousand, seven hundred twenty-eight".