28624173 has 4 divisors (see below), whose sum is σ = 38165568. Its totient is φ = 19082780.

The previous prime is 28624159. The next prime is 28624177. The reversal of 28624173 is 37142682.

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.

It is a cyclic number.

It is not a de Polignac number, because 28624173 - 2⁴ = 28624157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28624177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4770693 + ... + 4770698.

It is an arithmetic number, because the mean of its divisors is an integer number (9541392).

Almost surely, 2^28624173 is an apocalyptic number.

It is an amenable number.

28624173 is a deficient number, since it is larger than the sum of its proper divisors (9541395).

28624173 is an equidigital number, since it uses as much as digits as its factorization.

28624173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9541394.

The product of its digits is 16128, while the sum is 33.

The square root of 28624173 is about 5350.1563528555. The cubic root of 28624173 is about 305.8987126859.

The spelling of 28624173 in words is "twenty-eight million, six hundred twenty-four thousand, one hundred seventy-three".