28569845 has 16 divisors (see below), whose sum is σ = 35525952. Its totient is φ = 22041600.

The previous prime is 28569839. The next prime is 28569847. The reversal of 28569845 is 54896582.

It is not a de Polignac number, because 28569845 - 2⁴ = 28569829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28569845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28569847) 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, 17045 + ... + 18645.

It is an arithmetic number, because the mean of its divisors is an integer number (2220372).

Almost surely, 2^28569845 is an apocalyptic number.

It is an amenable number.

28569845 is a deficient number, since it is larger than the sum of its proper divisors (6956107).

28569845 is a wasteful number, since it uses less digits than its factorization.

28569845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732.

The product of its digits is 691200, while the sum is 47.

The square root of 28569845 is about 5345.0767066526. The cubic root of 28569845 is about 305.7050606232.

The spelling of 28569845 in words is "twenty-eight million, five hundred sixty-nine thousand, eight hundred forty-five".