28979816801 has 8 divisors (see below), whose sum is σ = 31210641000. Its totient is φ = 26749222272.

The previous prime is 28979816771. The next prime is 28979816813. The reversal of 28979816801 is 10861897982.

It can be written as a sum of positive squares in 4 ways, for example, as 3315456400 + 25664360401 = 57580^2 + 160201^2 .

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 28979816801 - 2⁶ = 28979816737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28979816821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276701 + ... + 366773.

It is an arithmetic number, because the mean of its divisors is an integer number (3901330125).

Almost surely, 2^28979816801 is an apocalyptic number.

It is an amenable number.

28979816801 is a deficient number, since it is larger than the sum of its proper divisors (2230824199).

28979816801 is a wasteful number, since it uses less digits than its factorization.

28979816801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114835.

The product of its (nonzero) digits is 3483648, while the sum is 59.

The spelling of 28979816801 in words is "twenty-eight billion, nine hundred seventy-nine million, eight hundred sixteen thousand, eight hundred one".