28142097677 has 4 divisors (see below), whose sum is σ = 28155170940. Its totient is φ = 28129024416.

The previous prime is 28142097637. The next prime is 28142097733. The reversal of 28142097677 is 77679024182.

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 5718233161 + 22423864516 = 75619^2 + 149746^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28142097677 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 (28142097637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6533402 + ... + 6537707.

It is an arithmetic number, because the mean of its divisors is an integer number (7038792735).

Almost surely, 2^28142097677 is an apocalyptic number.

It is an amenable number.

28142097677 is a deficient number, since it is larger than the sum of its proper divisors (13073263).

28142097677 is a wasteful number, since it uses less digits than its factorization.

28142097677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13073262.

The product of its (nonzero) digits is 2370816, while the sum is 53.

The spelling of 28142097677 in words is "twenty-eight billion, one hundred forty-two million, ninety-seven thousand, six hundred seventy-seven".