28605445 has 16 divisors (see below), whose sum is σ = 39076992. Its totient is φ = 19898560.

The previous prime is 28605443. The next prime is 28605457. The reversal of 28605445 is 54450682.

It is not a de Polignac number, because 28605445 - 2¹ = 28605443 is a prime.

It is a Duffinian number.

28605445 is a modest number, since divided by 5445 gives 2860 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 28605445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28605443) 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, 10042 + ... + 12571.

It is an arithmetic number, because the mean of its divisors is an integer number (2442312).

Almost surely, 2^28605445 is an apocalyptic number.

It is an amenable number.

28605445 is a deficient number, since it is larger than the sum of its proper divisors (10471547).

28605445 is a wasteful number, since it uses less digits than its factorization.

28605445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22652.

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 28605445 is about 5348.4058372566. The cubic root of 28605445 is about 305.8319844587.

The spelling of 28605445 in words is "twenty-eight million, six hundred five thousand, four hundred forty-five".