29281027689 has 15 divisors (see below), whose sum is σ = 43743095143. Its totient is φ = 19519658424.

The previous prime is 29281027631. The next prime is 29281027697. The reversal of 29281027689 is 98672018292.

The square root of 29281027689 is 171117.

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

29281027689 is a `hidden beast` number, since 292 + 8 + 1 + 0 + 276 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 29277947664 = 1755^2 + 171108^2 .

It is not a de Polignac number, because 29281027689 - 2³¹ = 27133544041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29281067689) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 1530547 + ... + 1549559.

Almost surely, 2^29281027689 is an apocalyptic number.

29281027689 is the 171117-th square number.

29281027689 is the 85559-th centered octagonal number.

It is an amenable number.

29281027689 is a deficient number, since it is larger than the sum of its proper divisors (14462067454).

29281027689 is an frugal number, since it uses more digits than its factorization.

29281027689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38038 (or 19016 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 29281027689 in words is "twenty-nine billion, two hundred eighty-one million, twenty-seven thousand, six hundred eighty-nine".