28497249 has 12 divisors (see below), whose sum is σ = 44904912. Its totient is φ = 17271000.

The previous prime is 28497247. The next prime is 28497257. The reversal of 28497249 is 94279482.

It is not a de Polignac number, because 28497249 - 2¹ = 28497247 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28497247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 143827 + ... + 144024.

It is an arithmetic number, because the mean of its divisors is an integer number (3742076).

Almost surely, 2^28497249 is an apocalyptic number.

It is an amenable number.

28497249 is a deficient number, since it is larger than the sum of its proper divisors (16407663).

28497249 is a wasteful number, since it uses less digits than its factorization.

28497249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287868 (or 287865 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28497249 is about 5338.2814650410. The cubic root of 28497249 is about 305.4459087259.

The spelling of 28497249 in words is "twenty-eight million, four hundred ninety-seven thousand, two hundred forty-nine".