728499305700 has 108 divisors (see below), whose sum is σ = 2285591712768. Its totient is φ = 194083473600.

The previous prime is 728499305687. The next prime is 728499305701. The reversal of 728499305700 is 7503994827.

728499305700 is a `hidden beast` number, since 7 + 28 + 49 + 9 + 3 + 0 + 570 + 0 = 666.

It is a super-2 number, since 2×728499305700² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728499305701) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 575965 + ... + 1337435.

Almost surely, 2^728499305700 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 728499305700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142795856384).

728499305700 is an abundant number, since it is smaller than the sum of its proper divisors (1557092407068).

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

728499305700 is a wasteful number, since it uses less digits than its factorization.

728499305700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762554 (or 762544 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 728499305700 in words is "seven hundred twenty-eight billion, four hundred ninety-nine million, three hundred five thousand, seven hundred".