28659645 has 48 divisors (see below), whose sum is σ = 58331520. Its totient is φ = 12742272.

The previous prime is 28659643. The next prime is 28659661. The reversal of 28659645 is 54695682.

It is not a de Polignac number, because 28659645 - 2¹ = 28659643 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28659645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28659643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10426 + ... + 12884.

It is an arithmetic number, because the mean of its divisors is an integer number (1215240).

Almost surely, 2^28659645 is an apocalyptic number.

It is an amenable number.

28659645 is an abundant number, since it is smaller than the sum of its proper divisors (29671875).

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

28659645 is a wasteful number, since it uses less digits than its factorization.

28659645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 2511 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 28659645 is about 5353.4703697695. The cubic root of 28659645 is about 306.0250203814.

The spelling of 28659645 in words is "twenty-eight million, six hundred fifty-nine thousand, six hundred forty-five".