28595824609 has 9 divisors (see below), whose sum is σ = 31433818899. Its totient is φ = 25994513160.

The previous prime is 28595824591. The next prime is 28595824643. The reversal of 28595824609 is 90642859582.

The square root of 28595824609 is 169103.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 448380625 + 28147443984 = 21175^2 + 167772^2 .

It is not a de Polignac number, because 28595824609 - 2¹¹ = 28595822561 is a prime.

It is a Duffinian number.

It is a zygodrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (28595824669) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1852447 + ... + 1867819.

Almost surely, 2^28595824609 is an apocalyptic number.

28595824609 is the 169103-rd square number.

28595824609 is the 84552-nd centered octagonal number.

It is an amenable number.

28595824609 is a deficient number, since it is larger than the sum of its proper divisors (2837994290).

28595824609 is an frugal number, since it uses more digits than its factorization.

28595824609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30768 (or 15384 counting only the distinct ones).

The product of its (nonzero) digits is 12441600, while the sum is 58.

The spelling of 28595824609 in words is "twenty-eight billion, five hundred ninety-five million, eight hundred twenty-four thousand, six hundred nine".