28534028261 has 8 divisors (see below), whose sum is σ = 30315744120. Its totient is φ = 26805498048.

The previous prime is 28534028239. The next prime is 28534028309. The reversal of 28534028261 is 16282043582.

It can be written as a sum of positive squares in 4 ways, for example, as 14030402500 + 14503625761 = 118450^2 + 120431^2 .

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 28534028261 - 2³⁴ = 11354159077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28534028161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13295306 + ... + 13297451.

It is an arithmetic number, because the mean of its divisors is an integer number (3789468015).

Almost surely, 2^28534028261 is an apocalyptic number.

It is an amenable number.

28534028261 is a deficient number, since it is larger than the sum of its proper divisors (1781715859).

28534028261 is a wasteful number, since it uses less digits than its factorization.

28534028261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26592823.

The product of its (nonzero) digits is 184320, while the sum is 41.

The spelling of 28534028261 in words is "twenty-eight billion, five hundred thirty-four million, twenty-eight thousand, two hundred sixty-one".