28229488538449 has 27 divisors (see below), whose sum is σ = 31476919180777. Its totient is φ = 25297999080200.

The previous prime is 28229488538443. The next prime is 28229488538599. The reversal of 28229488538449 is 94483588492282.

The square root of 28229488538449 is 5313143.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28229488538449 - 2³ = 28229488538441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28229488538441) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4149561282 + ... + 4149568084.

Almost surely, 2^{28229488538449} is an apocalyptic number.

28229488538449 is the 5313143-rd square number.

28229488538449 is the 2656572-nd centered octagonal number.

It is an amenable number.

28229488538449 is a deficient number, since it is larger than the sum of its proper divisors (3247430642328).

28229488538449 is an frugal number, since it uses more digits than its factorization.

28229488538449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13770 (or 6885 counting only the distinct ones).

The product of its digits is 2548039680, while the sum is 76.

The spelling of 28229488538449 in words is "twenty-eight trillion, two hundred twenty-nine billion, four hundred eighty-eight million, five hundred thirty-eight thousand, four hundred forty-nine".