28839851329 has 3 divisors (see below), whose sum is σ = 28840021153. Its totient is φ = 28839681506.

The previous prime is 28839851323. The next prime is 28839851413. The reversal of 28839851329 is 92315893882.

The square root of 28839851329 is 169823.

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, and also an emirpimes, since its reverse is a distinct semiprime: 92315893882 = 2 ⋅46157946941.

It is not a de Polignac number, because 28839851329 - 2¹⁵ = 28839818561 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28839851323) 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, 84912 + ... + 254734.

Almost surely, 2^28839851329 is an apocalyptic number.

28839851329 is the 169823-rd square number.

28839851329 is the 84912-nd centered octagonal number.

It is an amenable number.

28839851329 is a deficient number, since it is larger than the sum of its proper divisors (169824).

28839851329 is an frugal number, since it uses more digits than its factorization.

28839851329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339646 (or 169823 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 58.

The spelling of 28839851329 in words is "twenty-eight billion, eight hundred thirty-nine million, eight hundred fifty-one thousand, three hundred twenty-nine".