28910228310225 has 24 divisors (see below), whose sum is σ = 53109160156320. Its totient is φ = 15418788431760.

The previous prime is 28910228310199. The next prime is 28910228310251. The reversal of 28910228310225 is 52201382201982.

28910228310225 is a `hidden beast` number, since 2 + 8 + 9 + 102 + 2 + 8 + 310 + 225 = 666.

It is an interprime number because it is at equal distance from previous prime (28910228310199) and next prime (28910228310251).

It is not a de Polignac number, because 28910228310225 - 2¹² = 28910228306129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21414983259 + ... + 21414984608.

It is an arithmetic number, because the mean of its divisors is an integer number (2212881673180).

Almost surely, 2^{28910228310225} is an apocalyptic number.

28910228310225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28910228310225 is a deficient number, since it is larger than the sum of its proper divisors (24198931846095).

28910228310225 is a wasteful number, since it uses less digits than its factorization.

28910228310225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42829967886 (or 42829967875 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 28910228310225 in words is "twenty-eight trillion, nine hundred ten billion, two hundred twenty-eight million, three hundred ten thousand, two hundred twenty-five".