28076682877 has 4 divisors (see below), whose sum is σ = 29728252476. Its totient is φ = 26425113280.

The previous prime is 28076682839. The next prime is 28076682899. The reversal of 28076682877 is 77828667082.

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 14154098841 + 13922584036 = 118971^2 + 117994^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28076682877 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 (28076682817) 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, 825784774 + ... + 825784807.

It is an arithmetic number, because the mean of its divisors is an integer number (7432063119).

Almost surely, 2^28076682877 is an apocalyptic number.

It is an amenable number.

28076682877 is a deficient number, since it is larger than the sum of its proper divisors (1651569599).

28076682877 is a wasteful number, since it uses less digits than its factorization.

28076682877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1651569598.

The product of its (nonzero) digits is 25288704, while the sum is 61.

The spelling of 28076682877 in words is "twenty-eight billion, seventy-six million, six hundred eighty-two thousand, eight hundred seventy-seven".