28547073 has 20 divisors (see below), whose sum is σ = 42884820. Its totient is φ = 18924192.

The previous prime is 28547069. The next prime is 28547081. The reversal of 28547073 is 37074582.

It can be written as a sum of positive squares in 2 ways, for example, as 27531009 + 1016064 = 5247^2 + 1008^2 .

It is not a de Polignac number, because 28547073 - 2² = 28547069 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28547023) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15063 + ... + 16851.

It is an arithmetic number, because the mean of its divisors is an integer number (2144241).

Almost surely, 2^28547073 is an apocalyptic number.

It is an amenable number.

28547073 is a deficient number, since it is larger than the sum of its proper divisors (14337747).

28547073 is a wasteful number, since it uses less digits than its factorization.

28547073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998 (or 1989 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 28547073 is about 5342.9460974260. The cubic root of 28547073 is about 305.6238168496.

The spelling of 28547073 in words is "twenty-eight million, five hundred forty-seven thousand, seventy-three".