28226880001 has 4 divisors (see below), whose sum is σ = 28239300612. Its totient is φ = 28214459392.

The previous prime is 28226879999. The next prime is 28226880029. The reversal of 28226880001 is 10008862282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10008862282 = 2 ⋅5004431141.

It can be written as a sum of positive squares in 2 ways, for example, as 17322508225 + 10904371776 = 131615^2 + 104424^2 .

It is a cyclic number.

It is not a de Polignac number, because 28226880001 - 2¹ = 28226879999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28226880091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6206896 + ... + 6211441.

It is an arithmetic number, because the mean of its divisors is an integer number (7059825153).

Almost surely, 2^28226880001 is an apocalyptic number.

It is an amenable number.

28226880001 is a deficient number, since it is larger than the sum of its proper divisors (12420611).

28226880001 is a wasteful number, since it uses less digits than its factorization.

28226880001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12420610.

The product of its (nonzero) digits is 24576, while the sum is 37.

The spelling of 28226880001 in words is "twenty-eight billion, two hundred twenty-six million, eight hundred eighty thousand, one".