28678963 has 2 divisors, whose sum is σ = 28678964. Its totient is φ = 28678962.

The previous prime is 28678939. The next prime is 28678973. The reversal of 28678963 is 36987682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28678963 - 2⁵ = 28678931 is a prime.

It is not a weakly prime, because it can be changed into another prime (28678973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14339481 + 14339482.

It is an arithmetic number, because the mean of its divisors is an integer number (14339482).

Almost surely, 2^28678963 is an apocalyptic number.

28678963 is a deficient number, since it is larger than the sum of its proper divisors (1).

28678963 is an equidigital number, since it uses as much as digits as its factorization.

28678963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 28678963 is about 5355.2743160365. The cubic root of 28678963 is about 306.0937635400.

The spelling of 28678963 in words is "twenty-eight million, six hundred seventy-eight thousand, nine hundred sixty-three".