28279449 has 40 divisors (see below), whose sum is σ = 48822048. Its totient is φ = 16122240.

The previous prime is 28279441. The next prime is 28279451. The reversal of 28279449 is 94497282.

It is not a de Polignac number, because 28279449 - 2³ = 28279441 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28279441) 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 39 ways as a sum of consecutive naturals, for example, 14214 + ... + 16080.

Almost surely, 2^28279449 is an apocalyptic number.

It is an amenable number.

28279449 is a deficient number, since it is larger than the sum of its proper divisors (20542599).

28279449 is a wasteful number, since it uses less digits than its factorization.

28279449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1907 (or 1898 counting only the distinct ones).

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

The square root of 28279449 is about 5317.8425136516. The cubic root of 28279449 is about 304.6657594429.

The spelling of 28279449 in words is "twenty-eight million, two hundred seventy-nine thousand, four hundred forty-nine".