28514712769 has 3 divisors (see below), whose sum is σ = 28514881633. Its totient is φ = 28514543906.

The previous prime is 28514712763. The next prime is 28514712773. The reversal of 28514712769 is 96721741582.

The square root of 28514712769 is 168863.

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 is not a de Polignac number, because 28514712769 - 2¹⁵ = 28514680001 is a prime.

It is a super-2 number, since 2×28514712769² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28514712763) 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, 84432 + ... + 253294.

Almost surely, 2^28514712769 is an apocalyptic number.

28514712769 is the 168863-rd square number.

28514712769 is the 84432-nd centered octagonal number.

It is an amenable number.

28514712769 is a deficient number, since it is larger than the sum of its proper divisors (168864).

28514712769 is an frugal number, since it uses more digits than its factorization.

28514712769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337726 (or 168863 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 52.

The spelling of 28514712769 in words is "twenty-eight billion, five hundred fourteen million, seven hundred twelve thousand, seven hundred sixty-nine".