28986411513409 has 15 divisors (see below), whose sum is σ = 33757378742517. Its totient is φ = 24817165485336.

The previous prime is 28986411513377. The next prime is 28986411513443. The reversal of 28986411513409 is 90431511468982.

The square root of 28986411513409 is 5383903.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13604641271809 + 15381770241600 = 3688447^2 + 3921960^2 .

It is not a de Polignac number, because 28986411513409 - 2⁵ = 28986411513377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28986411513469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 33051780079 + ... + 33051780955.

Almost surely, 2^{28986411513409} is an apocalyptic number.

28986411513409 is the 5383903-rd square number.

28986411513409 is the 2691952-nd centered octagonal number.

It is an amenable number.

28986411513409 is a deficient number, since it is larger than the sum of its proper divisors (4770967229108).

28986411513409 is an frugal number, since it uses more digits than its factorization.

28986411513409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 884 counting only the distinct ones).

The product of its (nonzero) digits is 14929920, while the sum is 61.

The spelling of 28986411513409 in words is "twenty-eight trillion, nine hundred eighty-six billion, four hundred eleven million, five hundred thirteen thousand, four hundred nine".