28224293 has 2 divisors, whose sum is σ = 28224294. Its totient is φ = 28224292.

The previous prime is 28224271. The next prime is 28224307. The reversal of 28224293 is 39242282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19918369 + 8305924 = 4463^2 + 2882^2 .

It is a cyclic number.

It is not a de Polignac number, because 28224293 - 2¹⁴ = 28207909 is a prime.

It is a super-2 number, since 2×28224293² = 1593221430699698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28224223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14112146 + 14112147.

It is an arithmetic number, because the mean of its divisors is an integer number (14112147).

Almost surely, 2^28224293 is an apocalyptic number.

It is an amenable number.

28224293 is a deficient number, since it is larger than the sum of its proper divisors (1).

28224293 is an equidigital number, since it uses as much as digits as its factorization.

28224293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 28224293 is about 5312.6540448254. The cubic root of 28224293 is about 304.4675580167.

The spelling of 28224293 in words is "twenty-eight million, two hundred twenty-four thousand, two hundred ninety-three".