28995671779 has 8 divisors (see below), whose sum is σ = 29998074960. Its totient is φ = 27993438816.

The previous prime is 28995671723. The next prime is 28995671797. The reversal of 28995671779 is 97717659982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28995671779 - 2¹⁹ = 28995147491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28995671179) 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 7 ways as a sum of consecutive naturals, for example, 372909 + ... + 443905.

It is an arithmetic number, because the mean of its divisors is an integer number (3749759370).

Almost surely, 2^28995671779 is an apocalyptic number.

28995671779 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28995671779 is a deficient number, since it is larger than the sum of its proper divisors (1002403181).

28995671779 is a wasteful number, since it uses less digits than its factorization.

28995671779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85109.

The product of its digits is 120022560, while the sum is 70.

The spelling of 28995671779 in words is "twenty-eight billion, nine hundred ninety-five million, six hundred seventy-one thousand, seven hundred seventy-nine".