28448469 has 24 divisors (see below), whose sum is σ = 49029120. Its totient is φ = 16255512.

The previous prime is 28448467. The next prime is 28448477. The reversal of 28448469 is 96484482.

It is not a de Polignac number, because 28448469 - 2¹ = 28448467 is a prime.

It is a super-2 number, since 2×28448469² = 1618630776887922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28448467) 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 23 ways as a sum of consecutive naturals, for example, 9429 + ... + 12074.

It is an arithmetic number, because the mean of its divisors is an integer number (2042880).

Almost surely, 2^28448469 is an apocalyptic number.

It is an amenable number.

28448469 is a deficient number, since it is larger than the sum of its proper divisors (20580651).

28448469 is a wasteful number, since it uses less digits than its factorization.

28448469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21526 (or 21513 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 28448469 is about 5333.7106220717. The cubic root of 28448469 is about 305.2715274376.

The spelling of 28448469 in words is "twenty-eight million, four hundred forty-eight thousand, four hundred sixty-nine".