28524845449 has 3 divisors (see below), whose sum is σ = 28525014343. Its totient is φ = 28524676556.

The previous prime is 28524845431. The next prime is 28524845497. The reversal of 28524845449 is 94454842582.

It is a happy number.

The square root of 28524845449 is 168893.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 75951225 + 28448894224 = 8715^2 + 168668^2 .

It is not a de Polignac number, because 28524845449 - 2¹¹ = 28524843401 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 28524845449.

It is not an unprimeable number, because it can be changed into a prime (28524825449) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 84447 + ... + 253339.

Almost surely, 2^28524845449 is an apocalyptic number.

28524845449 is the 168893-rd square number.

28524845449 is the 84447-th centered octagonal number.

It is an amenable number.

28524845449 is a deficient number, since it is larger than the sum of its proper divisors (168894).

28524845449 is an frugal number, since it uses more digits than its factorization.

28524845449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337786 (or 168893 counting only the distinct ones).

The product of its digits is 14745600, while the sum is 55.

The spelling of 28524845449 in words is "twenty-eight billion, five hundred twenty-four million, eight hundred forty-five thousand, four hundred forty-nine".