28148814979 has 4 divisors (see below), whose sum is σ = 28747725984. Its totient is φ = 27549903976.

The previous prime is 28148814977. The next prime is 28148815003. The reversal of 28148814979 is 97941884182.

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 28148814979 - 2¹ = 28148814977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28148814977) 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, 299455432 + ... + 299455525.

It is an arithmetic number, because the mean of its divisors is an integer number (7186931496).

Almost surely, 2^28148814979 is an apocalyptic number.

28148814979 is a deficient number, since it is larger than the sum of its proper divisors (598911005).

28148814979 is an equidigital number, since it uses as much as digits as its factorization.

28148814979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598911004.

The product of its digits is 9289728, while the sum is 61.

The spelling of 28148814979 in words is "twenty-eight billion, one hundred forty-eight million, eight hundred fourteen thousand, nine hundred seventy-nine".