28548493 has 4 divisors (see below), whose sum is σ = 28561788. Its totient is φ = 28535200.

The previous prime is 28548479. The next prime is 28548521. The reversal of 28548493 is 39484582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18550249 + 9998244 = 4307^2 + 3162^2 .

It is a cyclic number.

It is not a de Polignac number, because 28548493 - 2¹³ = 28540301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28548463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2608 + ... + 7993.

It is an arithmetic number, because the mean of its divisors is an integer number (7140447).

Almost surely, 2^28548493 is an apocalyptic number.

It is an amenable number.

28548493 is a deficient number, since it is larger than the sum of its proper divisors (13295).

28548493 is a wasteful number, since it uses less digits than its factorization.

28548493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13294.

The product of its digits is 276480, while the sum is 43.

The square root of 28548493 is about 5343.0789812616. The cubic root of 28548493 is about 305.6288842533.

The spelling of 28548493 in words is "twenty-eight million, five hundred forty-eight thousand, four hundred ninety-three".