28916226085 has 8 divisors (see below), whose sum is σ = 34704683640. Its totient is φ = 23129505984.

The previous prime is 28916226071. The next prime is 28916226089. The reversal of 28916226085 is 58062261982.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2950771041 + 25965455044 = 54321^2 + 161138^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28916226085 - 2¹³ = 28916217893 is a prime.

It is a super-2 number, since 2×28916226085² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916226089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 397462 + ... + 464551.

It is an arithmetic number, because the mean of its divisors is an integer number (4338085455).

Almost surely, 2^28916226085 is an apocalyptic number.

It is an amenable number.

28916226085 is a deficient number, since it is larger than the sum of its proper divisors (5788457555).

28916226085 is an equidigital number, since it uses as much as digits as its factorization.

28916226085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868727.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 28916226085 in words is "twenty-eight billion, nine hundred sixteen million, two hundred twenty-six thousand, eighty-five".