728512957285 has 8 divisors (see below), whose sum is σ = 874227181176. Its totient is φ = 582802610880.

The previous prime is 728512957279. The next prime is 728512957309. The reversal of 728512957285 is 582759215827.

728512957285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 268678428964 + 459834528321 = 518342^2 + 678111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 728512957285 - 2¹³ = 728512949093 is a prime.

It is a super-2 number, since 2×728512957285² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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, 538626 + ... + 1321795.

It is an arithmetic number, because the mean of its divisors is an integer number (109278397647).

Almost surely, 2^728512957285 is an apocalyptic number.

It is an amenable number.

728512957285 is a deficient number, since it is larger than the sum of its proper divisors (145714223891).

728512957285 is a wasteful number, since it uses less digits than its factorization.

728512957285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1938743.

The product of its digits is 28224000, while the sum is 61.

The spelling of 728512957285 in words is "seven hundred twenty-eight billion, five hundred twelve million, nine hundred fifty-seven thousand, two hundred eighty-five".