28080800501 has 4 divisors (see below), whose sum is σ = 30240862092. Its totient is φ = 25920738912.

The previous prime is 28080800483. The next prime is 28080800537. The reversal of 28080800501 is 10500808082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18662292100 + 9418508401 = 136610^2 + 97049^2 .

It is a cyclic number.

It is not a de Polignac number, because 28080800501 - 2⁶ = 28080800437 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 (28080808501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1080030776 + ... + 1080030801.

It is an arithmetic number, because the mean of its divisors is an integer number (7560215523).

Almost surely, 2^28080800501 is an apocalyptic number.

It is an amenable number.

28080800501 is a deficient number, since it is larger than the sum of its proper divisors (2160061591).

28080800501 is a wasteful number, since it uses less digits than its factorization.

28080800501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160061590.

The product of its (nonzero) digits is 5120, while the sum is 32.

The spelling of 28080800501 in words is "twenty-eight billion, eighty million, eight hundred thousand, five hundred one".