28446247 has 2 divisors, whose sum is σ = 28446248. Its totient is φ = 28446246.

The previous prime is 28446179. The next prime is 28446259. The reversal of 28446247 is 74264482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28446247 is a prime.

It is a super-3 number, since 3×28446247³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28446277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14223123 + 14223124.

It is an arithmetic number, because the mean of its divisors is an integer number (14223124).

Almost surely, 2^28446247 is an apocalyptic number.

28446247 is a deficient number, since it is larger than the sum of its proper divisors (1).

28446247 is an equidigital number, since it uses as much as digits as its factorization.

28446247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86016, while the sum is 37.

The square root of 28446247 is about 5333.5023202395. The cubic root of 28446247 is about 305.2635793708.

The spelling of 28446247 in words is "twenty-eight million, four hundred forty-six thousand, two hundred forty-seven".