28704205769 has 8 divisors (see below), whose sum is σ = 28756809000. Its totient is φ = 28651651072.

The previous prime is 28704205763. The next prime is 28704205793. The reversal of 28704205769 is 96750240782.

It can be written as a sum of positive squares in 4 ways, for example, as 244515769 + 28459690000 = 15637^2 + 168700^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28704205769 - 2⁴ = 28704205753 is a prime.

It is a super-2 number, since 2×28704205769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28704205763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297997 + ... + 1319925.

It is an arithmetic number, because the mean of its divisors is an integer number (3594601125).

Almost surely, 2^28704205769 is an apocalyptic number.

It is an amenable number.

28704205769 is a deficient number, since it is larger than the sum of its proper divisors (52603231).

28704205769 is a wasteful number, since it uses less digits than its factorization.

28704205769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24267.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 28704205769 in words is "twenty-eight billion, seven hundred four million, two hundred five thousand, seven hundred sixty-nine".