28017306 has 32 divisors (see below), whose sum is σ = 64411200. Its totient is φ = 9016560.

The previous prime is 28017293. The next prime is 28017307. The reversal of 28017306 is 60371082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 28017306.

It is not an unprimeable number, because it can be changed into a prime (28017307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7380 + ... + 10511.

It is an arithmetic number, because the mean of its divisors is an integer number (2012850).

Almost surely, 2^28017306 is an apocalyptic number.

28017306 is an abundant number, since it is smaller than the sum of its proper divisors (36393894).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28017306 is a wasteful number, since it uses less digits than its factorization.

28017306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17931 (or 17925 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 28017306 is about 5293.1376328223. The cubic root of 28017306 is about 303.7214452657.

Adding to 28017306 its reverse (60371082), we get a palindrome (88388388).

The spelling of 28017306 in words is "twenty-eight million, seventeen thousand, three hundred six".