28224347 has 2 divisors, whose sum is σ = 28224348. Its totient is φ = 28224346.

The previous prime is 28224331. The next prime is 28224373. The reversal of 28224347 is 74342282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28224347 - 2⁴ = 28224331 is a prime.

It is a super-2 number, since 2×28224347² = 1593227527152818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28224307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14112173 + 14112174.

It is an arithmetic number, because the mean of its divisors is an integer number (14112174).

Almost surely, 2^28224347 is an apocalyptic number.

28224347 is a deficient number, since it is larger than the sum of its proper divisors (1).

28224347 is an equidigital number, since it uses as much as digits as its factorization.

28224347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 32.

The square root of 28224347 is about 5312.6591270286. The cubic root of 28224347 is about 304.4677521903.

The spelling of 28224347 in words is "twenty-eight million, two hundred twenty-four thousand, three hundred forty-seven".