28520467 has 4 divisors (see below), whose sum is σ = 28532896. Its totient is φ = 28508040.

The previous prime is 28520449. The next prime is 28520473. The reversal of 28520467 is 76402582.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28520467 - 2¹⁹ = 27996179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28520417) 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 3 ways as a sum of consecutive naturals, for example, 1659 + ... + 7732.

It is an arithmetic number, because the mean of its divisors is an integer number (7133224).

Almost surely, 2^28520467 is an apocalyptic number.

28520467 is a deficient number, since it is larger than the sum of its proper divisors (12429).

28520467 is an equidigital number, since it uses as much as digits as its factorization.

28520467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12428.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 28520467 is about 5340.4556921671. The cubic root of 28520467 is about 305.5288397481.

The spelling of 28520467 in words is "twenty-eight million, five hundred twenty thousand, four hundred sixty-seven".