728630571132 has 144 divisors (see below), whose sum is σ = 2070306201600. Its totient is φ = 214992973440.

The previous prime is 728630571073. The next prime is 728630571139. The reversal of 728630571132 is 231175036827.

728630571132 is a `hidden beast` number, since 7 + 2 + 8 + 63 + 0 + 571 + 13 + 2 = 666.

It is a super-2 number, since 2×728630571132² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728630571139) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22453 + ... + 1207379.

It is an arithmetic number, because the mean of its divisors is an integer number (14377126400).

Almost surely, 2^728630571132 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 728630571132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1035153100800).

728630571132 is an abundant number, since it is smaller than the sum of its proper divisors (1341675630468).

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

728630571132 is a wasteful number, since it uses less digits than its factorization.

728630571132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185016 (or 1185011 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 45.

The spelling of 728630571132 in words is "seven hundred twenty-eight billion, six hundred thirty million, five hundred seventy-one thousand, one hundred thirty-two".