28495720097 has 8 divisors (see below), whose sum is σ = 30747995880. Its totient is φ = 26252058240.

The previous prime is 28495720063. The next prime is 28495720103. The reversal of 28495720097 is 79002759482.

It can be written as a sum of positive squares in 4 ways, for example, as 4680749056 + 23814971041 = 68416^2 + 154321^2 .

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 28495720097 - 2¹⁴ = 28495703713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28495720597) 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, 2146604 + ... + 2159837.

It is an arithmetic number, because the mean of its divisors is an integer number (3843499485).

Almost surely, 2^28495720097 is an apocalyptic number.

It is an amenable number.

28495720097 is a deficient number, since it is larger than the sum of its proper divisors (2252275783).

28495720097 is a wasteful number, since it uses less digits than its factorization.

28495720097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4306963.

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 28495720097 in words is "twenty-eight billion, four hundred ninety-five million, seven hundred twenty thousand, ninety-seven".