28224529 has 2 divisors, whose sum is σ = 28224530. Its totient is φ = 28224528.

The previous prime is 28224433. The next prime is 28224533. The reversal of 28224529 is 92542282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21344400 + 6880129 = 4620^2 + 2623^2 .

It is a cyclic number.

It is not a de Polignac number, because 28224529 - 2⁷ = 28224401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28224494 and 28224503.

It is not a weakly prime, because it can be changed into another prime (28222529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14112264 + 14112265.

It is an arithmetic number, because the mean of its divisors is an integer number (14112265).

Almost surely, 2^28224529 is an apocalyptic number.

It is an amenable number.

28224529 is a deficient number, since it is larger than the sum of its proper divisors (1).

28224529 is an equidigital number, since it uses as much as digits as its factorization.

28224529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23040, while the sum is 34.

The square root of 28224529 is about 5312.6762558997. The cubic root of 28224529 is about 304.4684066254.

It can be divided in two parts, 28224 and 529, that multiplied together give a square (14930496 = 3864²).

The spelling of 28224529 in words is "twenty-eight million, two hundred twenty-four thousand, five hundred twenty-nine".