28489322401 has 2 divisors, whose sum is σ = 28489322402. Its totient is φ = 28489322400.

The previous prime is 28489322387. The next prime is 28489322417. The reversal of 28489322401 is 10422398482.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20718723600 + 7770598801 = 143940^2 + 88151^2 .

It is a cyclic number.

It is not a de Polignac number, because 28489322401 - 2⁷ = 28489322273 is a prime.

It is not a weakly prime, because it can be changed into another prime (28489322201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14244661200 + 14244661201.

It is an arithmetic number, because the mean of its divisors is an integer number (14244661201).

Almost surely, 2^28489322401 is an apocalyptic number.

It is an amenable number.

28489322401 is a deficient number, since it is larger than the sum of its proper divisors (1).

28489322401 is an equidigital number, since it uses as much as digits as its factorization.

28489322401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 221184, while the sum is 43.

The spelling of 28489322401 in words is "twenty-eight billion, four hundred eighty-nine million, three hundred twenty-two thousand, four hundred one".