728705731152 has 80 divisors (see below), whose sum is σ = 2171523727872. Its totient is φ = 206255817600.

The previous prime is 728705731121. The next prime is 728705731163. The reversal of 728705731152 is 251137507827.

It is a happy number.

It is a super-2 number, since 2×728705731152² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10098474 + ... + 10170377.

Almost surely, 2^728705731152 is an apocalyptic number.

It is an amenable number.

728705731152 is an abundant number, since it is smaller than the sum of its proper divisors (1442817996720).

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

728705731152 is a wasteful number, since it uses less digits than its factorization.

728705731152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20268976 (or 20268970 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 48.

The spelling of 728705731152 in words is "seven hundred twenty-eight billion, seven hundred five million, seven hundred thirty-one thousand, one hundred fifty-two".