28645286 has 4 divisors (see below), whose sum is σ = 42967932. Its totient is φ = 14322642.

The previous prime is 28645283. The next prime is 28645297. The reversal of 28645286 is 68254682.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28645283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7161320 + ... + 7161323.

It is an arithmetic number, because the mean of its divisors is an integer number (10741983).

Almost surely, 2^28645286 is an apocalyptic number.

28645286 is a deficient number, since it is larger than the sum of its proper divisors (14322646).

28645286 is a wasteful number, since it uses less digits than its factorization.

28645286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14322645.

The product of its digits is 184320, while the sum is 41.

The square root of 28645286 is about 5352.1291090556. The cubic root of 28645286 is about 305.9739038221.

The spelling of 28645286 in words is "twenty-eight million, six hundred forty-five thousand, two hundred eighty-six".