28480999801 has 4 divisors (see below), whose sum is σ = 28521629604. Its totient is φ = 28440370000.

The previous prime is 28480999769. The next prime is 28480999823. The reversal of 28480999801 is 10899908482.

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 27406471401 + 1074528400 = 165549^2 + 32780^2 .

It is a cyclic number.

It is not a de Polignac number, because 28480999801 - 2⁵ = 28480999769 is a prime.

It is a super-2 number, since 2×28480999801² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28480999901) 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 3 ways as a sum of consecutive naturals, for example, 20313850 + ... + 20315251.

It is an arithmetic number, because the mean of its divisors is an integer number (7130407401).

Almost surely, 2^28480999801 is an apocalyptic number.

It is an amenable number.

28480999801 is a deficient number, since it is larger than the sum of its proper divisors (40629803).

28480999801 is an equidigital number, since it uses as much as digits as its factorization.

28480999801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40629802.

The product of its (nonzero) digits is 2985984, while the sum is 58.

The spelling of 28480999801 in words is "twenty-eight billion, four hundred eighty million, nine hundred ninety-nine thousand, eight hundred one".