28924838749 has 4 divisors (see below), whose sum is σ = 28926341500. Its totient is φ = 28923336000.

The previous prime is 28924838729. The next prime is 28924838753. The reversal of 28924838749 is 94783842982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18021720025 + 10903118724 = 134245^2 + 104418^2 .

It is a cyclic number.

It is not a de Polignac number, because 28924838749 - 2¹¹ = 28924836701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28924838729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722124 + ... + 761125.

It is an arithmetic number, because the mean of its divisors is an integer number (7231585375).

Almost surely, 2^28924838749 is an apocalyptic number.

It is an amenable number.

28924838749 is a deficient number, since it is larger than the sum of its proper divisors (1502751).

28924838749 is a wasteful number, since it uses less digits than its factorization.

28924838749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502750.

The product of its digits is 55738368, while the sum is 64.

The spelling of 28924838749 in words is "twenty-eight billion, nine hundred twenty-four million, eight hundred thirty-eight thousand, seven hundred forty-nine".