28917641 has 2 divisors, whose sum is σ = 28917642. Its totient is φ = 28917640.

The previous prime is 28917619. The next prime is 28917653. The reversal of 28917641 is 14671982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27081616 + 1836025 = 5204^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 28917641 - 2¹⁰ = 28916617 is a prime.

It is a super-2 number, since 2×28917641² = 1672459922009762, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28917595 and 28917604.

It is not a weakly prime, because it can be changed into another prime (28917671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458820 + 14458821.

It is an arithmetic number, because the mean of its divisors is an integer number (14458821).

Almost surely, 2^28917641 is an apocalyptic number.

It is an amenable number.

28917641 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917641 is an equidigital number, since it uses as much as digits as its factorization.

28917641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 38.

The square root of 28917641 is about 5377.5125290417. The cubic root of 28917641 is about 306.9405643444.

The spelling of 28917641 in words is "twenty-eight million, nine hundred seventeen thousand, six hundred forty-one".