728726859025 has 135 divisors (see below), whose sum is σ = 1068760670305. Its totient is φ = 492797958400.

The previous prime is 728726859013. The next prime is 728726859043. The reversal of 728726859025 is 520958627827.

The square root of 728726859025 is 853655.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 17045652481 + 711681206544 = 130559^2 + 843612^2 .

It is not a de Polignac number, because 728726859025 - 2¹³ = 728726850833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 8779841634 + ... + 8779841716.

Almost surely, 2^728726859025 is an apocalyptic number.

728726859025 is the 853655-th square number.

728726859025 is the 426828-th centered octagonal number.

It is an amenable number.

728726859025 is a deficient number, since it is larger than the sum of its proper divisors (340033811280).

728726859025 is an frugal number, since it uses more digits than its factorization.

728726859025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 116 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 61.

The spelling of 728726859025 in words is "seven hundred twenty-eight billion, seven hundred twenty-six million, eight hundred fifty-nine thousand, twenty-five".