28228026149 has 2 divisors, whose sum is σ = 28228026150. Its totient is φ = 28228026148.

The previous prime is 28228026103. The next prime is 28228026157. The reversal of 28228026149 is 94162082282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27406802500 + 821223649 = 165550^2 + 28657^2 .

It is a cyclic number.

It is not a de Polignac number, because 28228026149 - 2⁸ = 28228025893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28228026049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14114013074 + 14114013075.

It is an arithmetic number, because the mean of its divisors is an integer number (14114013075).

Almost surely, 2^28228026149 is an apocalyptic number.

It is an amenable number.

28228026149 is a deficient number, since it is larger than the sum of its proper divisors (1).

28228026149 is an equidigital number, since it uses as much as digits as its factorization.

28228026149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 28228026149 in words is "twenty-eight billion, two hundred twenty-eight million, twenty-six thousand, one hundred forty-nine".