728736728522 has 16 divisors (see below), whose sum is σ = 1198721631744. Its totient is φ = 329509704000.

The previous prime is 728736728513. The next prime is 728736728537. The reversal of 728736728522 is 225827637827.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86708879 + ... + 86717282.

It is an arithmetic number, because the mean of its divisors is an integer number (74920101984).

Almost surely, 2^728736728522 is an apocalyptic number.

728736728522 is a deficient number, since it is larger than the sum of its proper divisors (469984903222).

728736728522 is a wasteful number, since it uses less digits than its factorization.

728736728522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173426365.

The product of its digits is 31610880, while the sum is 59.

The spelling of 728736728522 in words is "seven hundred twenty-eight billion, seven hundred thirty-six million, seven hundred twenty-eight thousand, five hundred twenty-two".