28541737249 has 3 divisors (see below), whose sum is σ = 28541906193. Its totient is φ = 28541568306.

The previous prime is 28541737247. The next prime is 28541737271. The reversal of 28541737249 is 94273714582.

The square root of 28541737249 is 168943.

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: 94273714582 = 2 ⋅47136857291.

It is not a de Polignac number, because 28541737249 - 2¹ = 28541737247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28541737196 and 28541737205.

It is not an unprimeable number, because it can be changed into a prime (28541737241) 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, 84472 + ... + 253414.

It is an arithmetic number, because the mean of its divisors is an integer number (9513968731).

Almost surely, 2^28541737249 is an apocalyptic number.

28541737249 is the 168943-rd square number.

28541737249 is the 84472-nd centered octagonal number.

It is an amenable number.

28541737249 is a deficient number, since it is larger than the sum of its proper divisors (168944).

28541737249 is an frugal number, since it uses more digits than its factorization.

28541737249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337886 (or 168943 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 52.

The spelling of 28541737249 in words is "twenty-eight billion, five hundred forty-one million, seven hundred thirty-seven thousand, two hundred forty-nine".