28369675489 has 3 divisors (see below), whose sum is σ = 28369843923. Its totient is φ = 28369507056.

The previous prime is 28369675421. The next prime is 28369675501. The reversal of 28369675489 is 98457696382.

The square root of 28369675489 is 168433.

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., 2063430625 + 26306244864 = 45425^2 + 162192^2 .

It is not a de Polignac number, because 28369675489 - 2¹⁹ = 28369151201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28369675189) 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, 84217 + ... + 252649.

It is an arithmetic number, because the mean of its divisors is an integer number (9456614641).

Almost surely, 2^28369675489 is an apocalyptic number.

28369675489 is the 168433-rd square number.

28369675489 is the 84217-th centered octagonal number.

It is an amenable number.

28369675489 is a deficient number, since it is larger than the sum of its proper divisors (168434).

28369675489 is an frugal number, since it uses more digits than its factorization.

28369675489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336866 (or 168433 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 67.

The spelling of 28369675489 in words is "twenty-eight billion, three hundred sixty-nine million, six hundred seventy-five thousand, four hundred eighty-nine".