28616663 has 2 divisors, whose sum is σ = 28616664. Its totient is φ = 28616662.

The previous prime is 28616639. The next prime is 28616683. The reversal of 28616663 is 36661682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28616663 - 2¹² = 28612567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28616683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14308331 + 14308332.

It is an arithmetic number, because the mean of its divisors is an integer number (14308332).

Almost surely, 2^28616663 is an apocalyptic number.

28616663 is a deficient number, since it is larger than the sum of its proper divisors (1).

28616663 is an equidigital number, since it uses as much as digits as its factorization.

28616663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 38.

The square root of 28616663 is about 5349.4544581667. The cubic root of 28616663 is about 305.8719579068.

The spelling of 28616663 in words is "twenty-eight million, six hundred sixteen thousand, six hundred sixty-three".