28707541489 has 27 divisors (see below), whose sum is σ = 32145089067. Its totient is φ = 25618269600.

The previous prime is 28707541483. The next prime is 28707541501. The reversal of 28707541489 is 98414570782.

The square root of 28707541489 is 169433.

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., 16295799025 + 12411742464 = 127655^2 + 111408^2 .

It is not a de Polignac number, because 28707541489 - 2³ = 28707541481 is a prime.

It is a super-3 number, since 3×28707541489³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28707541481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 136054594 + ... + 136054804.

Almost surely, 2^28707541489 is an apocalyptic number.

28707541489 is the 169433-rd square number.

28707541489 is the 84717-th centered octagonal number.

It is an amenable number.

28707541489 is a deficient number, since it is larger than the sum of its proper divisors (3437547578).

28707541489 is an frugal number, since it uses more digits than its factorization.

28707541489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 4515840, while the sum is 55.

The spelling of 28707541489 in words is "twenty-eight billion, seven hundred seven million, five hundred forty-one thousand, four hundred eighty-nine".