28746173 has 4 divisors (see below), whose sum is σ = 28953120. Its totient is φ = 28539228.

The previous prime is 28746161. The next prime is 28746181. The reversal of 28746173 is 37164782.

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: 37164782 = 2 ⋅18582391.

It is a cyclic number.

It is not a de Polignac number, because 28746173 - 2¹⁰ = 28745149 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 (28746103) 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, 103265 + ... + 103542.

It is an arithmetic number, because the mean of its divisors is an integer number (7238280).

Almost surely, 2^28746173 is an apocalyptic number.

It is an amenable number.

28746173 is a deficient number, since it is larger than the sum of its proper divisors (206947).

28746173 is a wasteful number, since it uses less digits than its factorization.

28746173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206946.

The product of its digits is 56448, while the sum is 38.

The square root of 28746173 is about 5361.5457659149. The cubic root of 28746173 is about 306.3326902628.

The spelling of 28746173 in words is "twenty-eight million, seven hundred forty-six thousand, one hundred seventy-three".