28972948193279 has 4 divisors (see below), whose sum is σ = 28972965958776. Its totient is φ = 28972930427784.

The previous prime is 28972948193239. The next prime is 28972948193309. The reversal of 28972948193279 is 97239184927982.

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

It is a cyclic number.

It is not a de Polignac number, because 28972948193279 - 2⁴⁰ = 27873436565503 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 (28972948193239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6157829 + ... + 9791054.

It is an arithmetic number, because the mean of its divisors is an integer number (7243241489694).

Almost surely, 2^{28972948193279} is an apocalyptic number.

28972948193279 is a deficient number, since it is larger than the sum of its proper divisors (17765497).

28972948193279 is a wasteful number, since it uses less digits than its factorization.

28972948193279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17765496.

The product of its digits is 1975228416, while the sum is 80.

The spelling of 28972948193279 in words is "twenty-eight trillion, nine hundred seventy-two billion, nine hundred forty-eight million, one hundred ninety-three thousand, two hundred seventy-nine".