28662247 has 2 divisors, whose sum is σ = 28662248. Its totient is φ = 28662246.

The previous prime is 28662199. The next prime is 28662269. The reversal of 28662247 is 74226682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28662247 - 2¹¹ = 28660199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28662287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14331123 + 14331124.

It is an arithmetic number, because the mean of its divisors is an integer number (14331124).

Almost surely, 2^28662247 is an apocalyptic number.

28662247 is a deficient number, since it is larger than the sum of its proper divisors (1).

28662247 is an equidigital number, since it uses as much as digits as its factorization.

28662247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 37.

The square root of 28662247 is about 5353.7133841849. The cubic root of 28662247 is about 306.0342814057.

The spelling of 28662247 in words is "twenty-eight million, six hundred sixty-two thousand, two hundred forty-seven".