28645513 has 16 divisors (see below), whose sum is σ = 31804416. Its totient is φ = 25634880.

The previous prime is 28645499. The next prime is 28645517. The reversal of 28645513 is 31554682.

It is a cyclic number.

It is not a de Polignac number, because 28645513 - 2¹⁷ = 28514441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28645517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105568 + ... + 105838.

It is an arithmetic number, because the mean of its divisors is an integer number (1987776).

Almost surely, 2^28645513 is an apocalyptic number.

It is an amenable number.

28645513 is a deficient number, since it is larger than the sum of its proper divisors (3158903).

28645513 is a wasteful number, since it uses less digits than its factorization.

28645513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504.

The product of its digits is 28800, while the sum is 34.

The square root of 28645513 is about 5352.1503155274. The cubic root of 28645513 is about 305.9747120515.

The spelling of 28645513 in words is "twenty-eight million, six hundred forty-five thousand, five hundred thirteen".