28979476807 has 4 divisors (see below), whose sum is σ = 29470654440. Its totient is φ = 28488299176.

The previous prime is 28979476789. The next prime is 28979476829. The reversal of 28979476807 is 70867497982.

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 28979476807 - 2⁷ = 28979476679 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 (28979476847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245588728 + ... + 245588845.

It is an arithmetic number, because the mean of its divisors is an integer number (7367663610).

Almost surely, 2^28979476807 is an apocalyptic number.

28979476807 is a deficient number, since it is larger than the sum of its proper divisors (491177633).

28979476807 is an equidigital number, since it uses as much as digits as its factorization.

28979476807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491177632.

The product of its (nonzero) digits is 85349376, while the sum is 67.

The spelling of 28979476807 in words is "twenty-eight billion, nine hundred seventy-nine million, four hundred seventy-six thousand, eight hundred seven".