28082104877 has 4 divisors (see below), whose sum is σ = 28148808636. Its totient is φ = 28015401120.

The previous prime is 28082104873. The next prime is 28082104907. The reversal of 28082104877 is 77840128082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14221516516 + 13860588361 = 119254^2 + 117731^2 .

It is a cyclic number.

It is not a de Polignac number, because 28082104877 - 2² = 28082104873 is a prime.

It is a super-2 number, since 2×28082104877² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28082104873) 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, 33351248 + ... + 33352089.

It is an arithmetic number, because the mean of its divisors is an integer number (7037202159).

Almost surely, 2^28082104877 is an apocalyptic number.

It is an amenable number.

28082104877 is a deficient number, since it is larger than the sum of its proper divisors (66703759).

28082104877 is an equidigital number, since it uses as much as digits as its factorization.

28082104877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66703758.

The product of its (nonzero) digits is 401408, while the sum is 47.

The spelling of 28082104877 in words is "twenty-eight billion, eighty-two million, one hundred four thousand, eight hundred seventy-seven".