28135530877 has 4 divisors (see below), whose sum is σ = 28137011040. Its totient is φ = 28134050716.

The previous prime is 28135530833. The next prime is 28135530889. The reversal of 28135530877 is 77803553182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28135530877 - 2¹⁵ = 28135498109 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28135530877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28135530377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711193 + ... + 749710.

It is an arithmetic number, because the mean of its divisors is an integer number (7034252760).

Almost surely, 2^28135530877 is an apocalyptic number.

It is an amenable number.

28135530877 is a deficient number, since it is larger than the sum of its proper divisors (1480163).

28135530877 is a wasteful number, since it uses less digits than its factorization.

28135530877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480162.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 28135530877 in words is "twenty-eight billion, one hundred thirty-five million, five hundred thirty thousand, eight hundred seventy-seven".