28127839677 has 32 divisors (see below), whose sum is σ = 44335448064. Its totient is φ = 15522451200.

The previous prime is 28127839657. The next prime is 28127839693. The reversal of 28127839677 is 77693872182.

It is not a de Polignac number, because 28127839677 - 2¹⁰ = 28127838653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28127839677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28127839657) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272677 + ... + 361397.

It is an arithmetic number, because the mean of its divisors is an integer number (1385482752).

Almost surely, 2^28127839677 is an apocalyptic number.

It is an amenable number.

28127839677 is a deficient number, since it is larger than the sum of its proper divisors (16207608387).

28127839677 is a wasteful number, since it uses less digits than its factorization.

28127839677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89249.

The product of its digits is 14224896, while the sum is 60.

The spelling of 28127839677 in words is "twenty-eight billion, one hundred twenty-seven million, eight hundred thirty-nine thousand, six hundred seventy-seven".