28224071 has 2 divisors, whose sum is σ = 28224072. Its totient is φ = 28224070.

The previous prime is 28224061. The next prime is 28224083. The reversal of 28224071 is 17042282.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28224071 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28224071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28224011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14112035 + 14112036.

It is an arithmetic number, because the mean of its divisors is an integer number (14112036).

Almost surely, 2^28224071 is an apocalyptic number.

28224071 is a deficient number, since it is larger than the sum of its proper divisors (1).

28224071 is an equidigital number, since it uses as much as digits as its factorization.

28224071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 28224071 is about 5312.6331512725. The cubic root of 28224071 is about 304.4667597448.

The spelling of 28224071 in words is "twenty-eight million, two hundred twenty-four thousand, seventy-one".