28128704341 has 8 divisors (see below), whose sum is σ = 28526301144. Its totient is φ = 27731439360.

The previous prime is 28128704291. The next prime is 28128704353. The reversal of 28128704341 is 14340782182.

It can be written as a sum of positive squares in 4 ways, for example, as 6475581841 + 21653122500 = 80471^2 + 147150^2 .

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 28128704341 - 2²¹ = 28126607189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28128704294 and 28128704303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28128704141) 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, 90321 + ... + 253801.

It is an arithmetic number, because the mean of its divisors is an integer number (3565787643).

Almost surely, 2^28128704341 is an apocalyptic number.

It is an amenable number.

28128704341 is a deficient number, since it is larger than the sum of its proper divisors (397596803).

28128704341 is a wasteful number, since it uses less digits than its factorization.

28128704341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165911.

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 28128704341 in words is "twenty-eight billion, one hundred twenty-eight million, seven hundred four thousand, three hundred forty-one".