28911065417 has 24 divisors (see below), whose sum is σ = 32105866968. Its totient is φ = 26006822400.

The previous prime is 28911065401. The next prime is 28911065429. The reversal of 28911065417 is 71456011982.

It can be written as a sum of positive squares in 12 ways, for example, as 10490061241 + 18421004176 = 102421^2 + 135724^2 .

It is not a de Polignac number, because 28911065417 - 2⁴ = 28911065401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28911064417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8181383 + ... + 8184915.

It is an arithmetic number, because the mean of its divisors is an integer number (1337744457).

Almost surely, 2^28911065417 is an apocalyptic number.

It is an amenable number.

28911065417 is a deficient number, since it is larger than the sum of its proper divisors (3194801551).

28911065417 is a wasteful number, since it uses less digits than its factorization.

28911065417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4781 (or 4768 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The spelling of 28911065417 in words is "twenty-eight billion, nine hundred eleven million, sixty-five thousand, four hundred seventeen".