28449473 has 16 divisors (see below), whose sum is σ = 31530240. Its totient is φ = 25508736.

The previous prime is 28449439. The next prime is 28449497. The reversal of 28449473 is 37494482.

It is a cyclic number.

It is not a de Polignac number, because 28449473 - 2⁶ = 28449409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28449473.

It is not an unprimeable number, because it can be changed into a prime (28449073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77336 + ... + 77702.

It is an arithmetic number, because the mean of its divisors is an integer number (1970640).

Almost surely, 2^28449473 is an apocalyptic number.

It is an amenable number.

28449473 is a deficient number, since it is larger than the sum of its proper divisors (3080767).

28449473 is a wasteful number, since it uses less digits than its factorization.

28449473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536.

The product of its digits is 193536, while the sum is 41.

The square root of 28449473 is about 5333.8047395832. The cubic root of 28449473 is about 305.2751185975.

The spelling of 28449473 in words is "twenty-eight million, four hundred forty-nine thousand, four hundred seventy-three".