28616879 has 2 divisors, whose sum is σ = 28616880. Its totient is φ = 28616878.

The previous prime is 28616867. The next prime is 28616927. The reversal of 28616879 is 97861682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28616879 - 2¹⁶ = 28551343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28616849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14308439 + 14308440.

It is an arithmetic number, because the mean of its divisors is an integer number (14308440).

Almost surely, 2^28616879 is an apocalyptic number.

28616879 is a deficient number, since it is larger than the sum of its proper divisors (1).

28616879 is an equidigital number, since it uses as much as digits as its factorization.

28616879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 47.

The square root of 28616879 is about 5349.4746471032. The cubic root of 28616879 is about 305.8727274838.

The spelling of 28616879 in words is "twenty-eight million, six hundred sixteen thousand, eight hundred seventy-nine".