28280028249 has 24 divisors (see below), whose sum is σ = 44607955392. Its totient is φ = 17121916320.

The previous prime is 28280028221. The next prime is 28280028269. The reversal of 28280028249 is 94282008282.

It is not a de Polignac number, because 28280028249 - 2¹² = 28280024153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28280028209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47982 + ... + 242615.

It is an arithmetic number, because the mean of its divisors is an integer number (1858664808).

Almost surely, 2^28280028249 is an apocalyptic number.

It is an amenable number.

28280028249 is a deficient number, since it is larger than the sum of its proper divisors (16327927143).

28280028249 is a wasteful number, since it uses less digits than its factorization.

28280028249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291597 (or 291594 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 45.

The spelling of 28280028249 in words is "twenty-eight billion, two hundred eighty million, twenty-eight thousand, two hundred forty-nine".