28132417 has 2 divisors, whose sum is σ = 28132418. Its totient is φ = 28132416.

The previous prime is 28132393. The next prime is 28132441. The reversal of 28132417 is 71423182.

It is a Cunningham number, because it is equal to 5304²+1.

It is a balanced prime because it is at equal distance from previous prime (28132393) and next prime (28132441).

It can be written as a sum of positive squares in only one way, i.e., 28132416 + 1 = 5304^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28132417 is a prime.

It is equal to p_1749151 and since 28132417 and 1749151 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (28132487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14066208 + 14066209.

It is an arithmetic number, because the mean of its divisors is an integer number (14066209).

Almost surely, 2^28132417 is an apocalyptic number.

It is an amenable number.

28132417 is a deficient number, since it is larger than the sum of its proper divisors (1).

28132417 is an equidigital number, since it uses as much as digits as its factorization.

28132417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 28.

The square root of 28132417 is about 5304.0000942685. Note that the first 4 decimals coincide. The cubic root of 28132417 is about 304.1368302837.

Adding to 28132417 its reverse (71423182), we get a palindrome (99555599).

The spelling of 28132417 in words is "twenty-eight million, one hundred thirty-two thousand, four hundred seventeen".