28303673 has 4 divisors (see below), whose sum is σ = 29793360. Its totient is φ = 26813988.

The previous prime is 28303669. The next prime is 28303687. The reversal of 28303673 is 37630382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37630382 = 2 ⋅18815191.

It is a cyclic number.

It is not a de Polignac number, because 28303673 - 2² = 28303669 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28303603) 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, 744815 + ... + 744852.

It is an arithmetic number, because the mean of its divisors is an integer number (7448340).

Almost surely, 2^28303673 is an apocalyptic number.

It is an amenable number.

28303673 is a deficient number, since it is larger than the sum of its proper divisors (1489687).

28303673 is a wasteful number, since it uses less digits than its factorization.

28303673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489686.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 28303673 is about 5320.1196415118. The cubic root of 28303673 is about 304.7527262136.

The spelling of 28303673 in words is "twenty-eight million, three hundred three thousand, six hundred seventy-three".