28802210117 has 2 divisors, whose sum is σ = 28802210118. Its totient is φ = 28802210116.

The previous prime is 28802210051. The next prime is 28802210123. The reversal of 28802210117 is 71101220882.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21323592676 + 7478617441 = 146026^2 + 86479^2 .

It is a cyclic number.

It is not a de Polignac number, because 28802210117 - 2⁸ = 28802209861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28802210147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14401105058 + 14401105059.

It is an arithmetic number, because the mean of its divisors is an integer number (14401105059).

Almost surely, 2^28802210117 is an apocalyptic number.

It is an amenable number.

28802210117 is a deficient number, since it is larger than the sum of its proper divisors (1).

28802210117 is an equidigital number, since it uses as much as digits as its factorization.

28802210117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3584, while the sum is 32.

Adding to 28802210117 its reverse (71101220882), we get a palindrome (99903430999).

The spelling of 28802210117 in words is "twenty-eight billion, eight hundred two million, two hundred ten thousand, one hundred seventeen".