28917653 has 2 divisors, whose sum is σ = 28917654. Its totient is φ = 28917652.

The previous prime is 28917641. The next prime is 28917671. The reversal of 28917653 is 35671982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28536964 + 380689 = 5342^2 + 617^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28917653 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28917653.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28917253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14458826 + 14458827.

It is an arithmetic number, because the mean of its divisors is an integer number (14458827).

Almost surely, 2^28917653 is an apocalyptic number.

It is an amenable number.

28917653 is a deficient number, since it is larger than the sum of its proper divisors (1).

28917653 is an equidigital number, since it uses as much as digits as its factorization.

28917653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 28917653 is about 5377.5136447991. The cubic root of 28917653 is about 306.9406068016.

The spelling of 28917653 in words is "twenty-eight million, nine hundred seventeen thousand, six hundred fifty-three".