28243089 has 12 divisors (see below), whose sum is σ = 46623616. Its totient is φ = 16138872.

The previous prime is 28243087. The next prime is 28243091. The reversal of 28243089 is 98034282.

It is an interprime number because it is at equal distance from previous prime (28243087) and next prime (28243091).

It is not a de Polignac number, because 28243089 - 2¹ = 28243087 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28243087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 224089 + ... + 224214.

Almost surely, 2^28243089 is an apocalyptic number.

It is an amenable number.

28243089 is a deficient number, since it is larger than the sum of its proper divisors (18380527).

28243089 is a wasteful number, since it uses less digits than its factorization.

28243089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448316 (or 448313 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28243089 is about 5314.4227344087. The cubic root of 28243089 is about 304.5351298578.

The spelling of 28243089 in words is "twenty-eight million, two hundred forty-three thousand, eighty-nine".