28216679 has 2 divisors, whose sum is σ = 28216680. Its totient is φ = 28216678.

The previous prime is 28216663. The next prime is 28216687. The reversal of 28216679 is 97661282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28216679 - 2⁴ = 28216663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28216079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14108339 + 14108340.

It is an arithmetic number, because the mean of its divisors is an integer number (14108340).

Almost surely, 2^28216679 is an apocalyptic number.

28216679 is a deficient number, since it is larger than the sum of its proper divisors (1).

28216679 is an equidigital number, since it uses as much as digits as its factorization.

28216679 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 28216679 is about 5311.9374055047. The cubic root of 28216679 is about 304.4401770595.

It can be divided in two parts, 282 and 16679, that added together give a palindrome (16961).

The spelling of 28216679 in words is "twenty-eight million, two hundred sixteen thousand, six hundred seventy-nine".