28352945801 has 4 divisors (see below), whose sum is σ = 28353854100. Its totient is φ = 28352037504.

The previous prime is 28352945771. The next prime is 28352945809. The reversal of 28352945801 is 10854925382.

It is a happy number.

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 1509400201 + 26843545600 = 38851^2 + 163840^2 .

It is a cyclic number.

It is not a de Polignac number, because 28352945801 - 2³⁰ = 27279203977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28352945809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 405596 + ... + 470333.

It is an arithmetic number, because the mean of its divisors is an integer number (7088463525).

Almost surely, 2^28352945801 is an apocalyptic number.

It is an amenable number.

28352945801 is a deficient number, since it is larger than the sum of its proper divisors (908299).

28352945801 is an equidigital number, since it uses as much as digits as its factorization.

28352945801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 908298.

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 28352945801 in words is "twenty-eight billion, three hundred fifty-two million, nine hundred forty-five thousand, eight hundred one".