28308463 has 2 divisors, whose sum is σ = 28308464. Its totient is φ = 28308462.

The previous prime is 28308457. The next prime is 28308473. The reversal of 28308463 is 36480382.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28308463 - 2¹³ = 28300271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28308403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14154231 + 14154232.

It is an arithmetic number, because the mean of its divisors is an integer number (14154232).

Almost surely, 2^28308463 is an apocalyptic number.

28308463 is a deficient number, since it is larger than the sum of its proper divisors (1).

28308463 is an equidigital number, since it uses as much as digits as its factorization.

28308463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 28308463 is about 5320.5698003127. The cubic root of 28308463 is about 304.7699169532.

The spelling of 28308463 in words is "twenty-eight million, three hundred eight thousand, four hundred sixty-three".