28889509390561 has 8 divisors (see below), whose sum is σ = 29001504789504. Its totient is φ = 28777669435200.

The previous prime is 28889509390531. The next prime is 28889509390667. The reversal of 28889509390561 is 16509390598882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28889509390561 is a prime.

It is a super-3 number, since 3×28889509390561³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28889509390531) 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 7 ways as a sum of consecutive naturals, for example, 38488465 + ... + 39231886.

It is an arithmetic number, because the mean of its divisors is an integer number (3625188098688).

Almost surely, 2^{28889509390561} is an apocalyptic number.

It is an amenable number.

28889509390561 is a deficient number, since it is larger than the sum of its proper divisors (111995398943).

28889509390561 is a wasteful number, since it uses less digits than its factorization.

28889509390561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77721791.

The product of its (nonzero) digits is 335923200, while the sum is 73.

The spelling of 28889509390561 in words is "twenty-eight trillion, eight hundred eighty-nine billion, five hundred nine million, three hundred ninety thousand, five hundred sixty-one".