28994417 has 2 divisors, whose sum is σ = 28994418. Its totient is φ = 28994416.

The previous prime is 28994389. The next prime is 28994431. The reversal of 28994417 is 71449982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20286016 + 8708401 = 4504^2 + 2951^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28994417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28994447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14497208 + 14497209.

It is an arithmetic number, because the mean of its divisors is an integer number (14497209).

Almost surely, 2^28994417 is an apocalyptic number.

It is an amenable number.

28994417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28994417 is an equidigital number, since it uses as much as digits as its factorization.

28994417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 28994417 is about 5384.6464136469. The cubic root of 28994417 is about 307.2119655046.

The spelling of 28994417 in words is "twenty-eight million, nine hundred ninety-four thousand, four hundred seventeen".