28517623 has 2 divisors, whose sum is σ = 28517624. Its totient is φ = 28517622.

The previous prime is 28517617. The next prime is 28517633. The reversal of 28517623 is 32671582.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28517623 - 2¹³ = 28509431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28517603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14258811 + 14258812.

It is an arithmetic number, because the mean of its divisors is an integer number (14258812).

Almost surely, 2^28517623 is an apocalyptic number.

28517623 is a deficient number, since it is larger than the sum of its proper divisors (1).

28517623 is an equidigital number, since it uses as much as digits as its factorization.

28517623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 28517623 is about 5340.1894161162. The cubic root of 28517623 is about 305.5186838496.

The spelling of 28517623 in words is "twenty-eight million, five hundred seventeen thousand, six hundred twenty-three".