28417247 has 2 divisors, whose sum is σ = 28417248. Its totient is φ = 28417246.

The previous prime is 28417241. The next prime is 28417267. The reversal of 28417247 is 74271482.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28417247 - 2⁴ = 28417231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28417241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14208623 + 14208624.

It is an arithmetic number, because the mean of its divisors is an integer number (14208624).

Almost surely, 2^28417247 is an apocalyptic number.

28417247 is a deficient number, since it is larger than the sum of its proper divisors (1).

28417247 is an equidigital number, since it uses as much as digits as its factorization.

28417247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 35.

The square root of 28417247 is about 5330.7829631303. The cubic root of 28417247 is about 305.1598087535.

The spelling of 28417247 in words is "twenty-eight million, four hundred seventeen thousand, two hundred forty-seven".