28645673 has 8 divisors (see below), whose sum is σ = 34461120. Its totient is φ = 23261040.

The previous prime is 28645667. The next prime is 28645681. The reversal of 28645673 is 37654682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28645673 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28645673.

It is not an unprimeable number, because it can be changed into a prime (28645633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107558 + ... + 107823.

It is an arithmetic number, because the mean of its divisors is an integer number (4307640).

Almost surely, 2^28645673 is an apocalyptic number.

It is an amenable number.

28645673 is a deficient number, since it is larger than the sum of its proper divisors (5815447).

28645673 is a wasteful number, since it uses less digits than its factorization.

28645673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215407.

The product of its digits is 241920, while the sum is 41.

The square root of 28645673 is about 5352.1652627698. The cubic root of 28645673 is about 305.9752817261.

Subtracting 28645673 from its reverse (37654682), we obtain a palindrome (9009009).

The spelling of 28645673 in words is "twenty-eight million, six hundred forty-five thousand, six hundred seventy-three".